Calcium Superphosphate
Product Profile
Apply for Sample| Names | |
|---|---|
| Preferred IUPAC name | Calcium dihydrogen triphosphate |
| Other names | Superphosphate Single Superphosphate Ordinary Superphosphate SSP |
| Pronunciation | /ˈkæl.si.əm ˌsuː.pərˈfɒs.feɪt/ |
| Identifiers | |
| CAS Number | 7778-18-9 |
| Beilstein Reference | 3541715 |
| ChEBI | CHEBI:31339 |
| ChEMBL | CHEMBL1201743 |
| ChemSpider | 21570154 |
| DrugBank | DB14555 |
| ECHA InfoCard | 03b91afc-aa04-4080-8de7-1e6f1d68bafe |
| EC Number | 231-826-1 |
| Gmelin Reference | 12462 |
| KEGG | C01327 |
| MeSH | D002121 |
| PubChem CID | 24856167 |
| RTECS number | TN9600000 |
| UNII | 7O8F81G0WL |
| UN number | UN1350 |
| Properties | |
| Chemical formula | Ca(H₂PO₄)₂ |
| Molar mass | 252.07 g/mol |
| Appearance | gray or gray-white granular or powder |
| Odor | Odorless |
| Density | 0.96-1.11 g/cm³ |
| Solubility in water | Soluble in water |
| log P | -4.4 |
| Vapor pressure | Negligible |
| Acidity (pKa) | 6.5 |
| Basicity (pKb) | 7.5 |
| Magnetic susceptibility (χ) | Diamagnetic |
| Dipole moment | 0.00 D |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 124.7 J·mol⁻¹·K⁻¹ |
| Std enthalpy of formation (ΔfH⦵298) | -1837 kJ/mol |
| Std enthalpy of combustion (ΔcH⦵298) | -2345 kJ/mol |
| Pharmacology | |
| ATC code | A12AA04 |
| Hazards | |
| Main hazards | Harmful if swallowed. Causes serious eye irritation. May cause respiratory irritation. |
| GHS labelling | GHS07, GHS09 |
| Pictograms | GHS05,GHS07 |
| Signal word | Warning |
| Hazard statements | H315: Causes skin irritation. H319: Causes serious eye irritation. H335: May cause respiratory irritation. |
| Precautionary statements | Keep out of reach of children. Read label before use. Wash hands thoroughly after handling. Do not eat, drink or smoke when using this product. Avoid release to the environment. Wear protective gloves/protective clothing/eye protection/face protection. |
| NFPA 704 (fire diamond) | 2-0-0 |
| Lethal dose or concentration | LD50 oral rat: >2000 mg/kg |
| LD50 (median dose) | LD50 (median dose): 2,000 mg/kg (rat, oral) |
| NIOSH | NA#0162 |
| PEL (Permissible) | PEL: 15 mg/m3 |
| REL (Recommended) | 400-600 |
| IDLH (Immediate danger) | Unknown |
| Related compounds | |
| Related compounds | Monocalcium phosphate Dicalcium phosphate Triple superphosphate Phosphoric acid Gypsum |
Chemical ID: CAS Formula HS Code Database
Product: Calcium Superphosphate
| Property | Technical Details and Commentary from Manufacturer Perspective |
|---|---|
| Product Name & IUPAC Name |
Product Name: Calcium Superphosphate IUPAC Name: Calcium dihydrogen phosphate (commonly produced as a mixture with gypsum) Naming conventions in technical usage may reflect product granulation, P2O5 content, and physical form, leading to names such as "single superphosphate" or "normal superphosphate." Naming is not standardized globally and can follow regional or customer requirements. |
| Chemical Formula |
Ca(H2PO4)2·H2O (primary component in most products labeled as superphosphate) Superphosphate fertilizers usually contain a mixture due to incomplete conversion, including dihydrogen phosphate and calcium sulfate (CaSO4·2H2O) from the process. The actual molecular composition fluctuates with raw material source, acidulation level, and curing time. |
| Synonyms & Trade Names |
Superphosphate, Single Superphosphate (SSP), Ordinary Superphosphate, Simple Superphosphate, Calcium dihydrogen phosphate–gypsum mixture. Trade names may cite P2O5 guaranteed content or regional terminology. Superphosphate quality references sometimes specify "powder" or "granular" depending on downstream user preference for blending. |
| HS Code & Customs Classification |
HS Code: 3103.10 Customs Classification: Falling under "Mineral or Chemical Fertilizers, Phosphatic – Superphosphates" Classification may be subdivided by the declared content of phosphoric acid (P2O5) or physical form (bulk, bagged, granulated) as required by regional customs authorities. Customs clearing relies on verifying total P2O5 content and detectable free acid, both of which are established by production controls and on final product testing. |
Technical Commentary from Manufacturer Experience
In calcium superphosphate production, key identifiers such as CAS, formula, and HS classification stem from established industrial chemistry, but the actual plant outputs reflect raw material variability and batch operations. Chemical identity is influenced by phosphate rock source, the acidulation method (typically sulfuric acid reacting with natural phosphate), and the plant’s degree of conversion efficiency. Process water content, reaction temperature, and maturation impact the extent to which phosphate remains in the mono- or dihydrogen form and how much gypsum coexists as a physical admixture.
HS code application benefits from direct collaboration between manufacturer technical staff and logistics teams. Misclassification can cause costly border delays or re-export. As a manufacturer, on-site validation of product moisture, P2O5 speciation, and granulometry is part of both regulatory compliance and quality assurance for customers relying on predictable reactivity in soil. Shipment documentation follows testing performed at release, and test procedures align with national or local fertilizer standards (such as those set by GB, JIS, or ISO) when specified by the buyer.
The synonym profile grows out of both export experience and feedback from downstream agricultural blenders, who may request assurance on granule strength or blending compatibility. Not all markets use the same technical terminology, so the technical team tracks procurement and labeling conventions in order to align shipments with customer contracts and avoid port misidentification. This technical normalization promotes consistent handling, application, and use in fertilizer formulation even with supply chain complexity.
Technical Properties, Manufacturing Process & Safety Guidelines: Calcium Superphosphate
Physical & Chemical Properties
Physical State & Appearance
Industrial calcium superphosphate is typically processed into a pale grey or off-white powder or granular material. The appearance shifts with grade—finely milled products serve direct application channels, while coarse granules target bulk fertilizer blends. Slight moisture pick-up may darken the material or cause caking during extended storage. Odor remains faint or earthy due to trace residuals and inherent phosphate content. Exact values for melting and boiling points do not apply, as the material decomposes before reaching these thermal limits. Flash point is not relevant.
Density
Bulk density falls within a typical range decided by granule shape, moisture, and pressing force during finishing. High-density granules enhance ease of bulk transit and blending consistency, but applications requiring direct soil suspension may use lighter forms to facilitate dissolution.
Chemical Stability & Reactivity
The phosphate chemistry remains robust in storage, though extended exposure to moisture produces free phosphoric acid, accelerating corrosion risk on mild steel and promoting cake formation. Incompatible with strong alkalis and strong oxidizers—grade purity decides reactivity profile, making raw specifications and impurity control central to safe downstream handling.
Solubility & Solution Preparation
Dissolution performance responds to both grade particle size and phosphate content. Fine materials disperse quicker but form thicker suspensions. Agriculture-grade material is often formulated for solubility in neutral water, but laboratory assessment and careful dosing guide industrial process solution prep for any downstream chemical application.
Technical Specifications & Quality Parameters
Specification Table by Grade
| Parameter | Agricultural Grade | Technical Grade |
|---|---|---|
| Available P2O5 | Value depends on blend ratio; requested per application | Typically higher, grade-specific |
| Moisture content | Grade and packaging dependent | Usually lower, controlled by drying |
| Granulometry | Producer-defined, matched to application method | Customized to process requirement |
Impurity Profile & Limits
Impurity management focuses on restricting free acid, unconverted calcium, and heavy metals. Raw ore source sets elemental background, and process design targets consistent reduction of undesirable ions. Each customer segment sets maximum impurity thresholds by region—phosphate rock’s fluoride and cadmium require special monitoring.
Test Methods & Standards
Local and national standards dictate sampling and testing, including water-soluble phosphate determination, screening for acid residue, and monitoring of particle size. Our internal release standards are tailored in collaboration with end user feedback to ensure fit for purpose in each regional market.
Preparation Methods & Manufacturing Process
Raw Materials & Sourcing
The selected phosphate ore dictates impurity loading and downstream purification volume. Sulfuric acid purity directly impacts finished product clarity and residual sulfur content. Cost, supply consistency, and regionally available resources affect choice of both inputs.
Synthesis Route & Reaction Mechanism
Manufacturing applies a controlled reaction between ground phosphate rock and sulfuric acid, forming monocalcium phosphate with calcium sulfate as a secondary phase. Parameters like acid concentration, reaction temperature, and residence time govern the conversion and impurity pathway. Upstream ore washing or pretreatment may be required for high-purity lots.
Process Control & Purification
Continuous monitoring of acid dosing, slurry homogeneity, and reaction completeness is critical. Post-reaction, filtration removes insolubles, and optional washing or drying adapts to the grade specification. Sifting and anti-caking steps prepare the product for final packing. Segregated processes handle high-purity and standard runs to maintain batch integrity.
Quality Control & Batch Release
Analytical laboratories sample every lot, monitoring solubility, P2O5 concentration, free acid, and bulk handling properties. Any deviation undergoes root-cause tracking. The final release criterion is based on internal QC benchmarks and customer-specific designation.
Chemical Reactions & Modification Potential
Typical Reactions
Superphosphate reacts in soil with calcium and magnesium ions, gradually releasing plant-available phosphate. Under neutralization or high pH, potential precipitation of insoluble phosphates influences fertilizer efficiency, so field conditions guide application rates. In industrial use, monocalcium phosphate can serve as a precursor for tailored phosphoric acid streams.
Reaction Conditions
Industrial reactors set temperature and liquid–solid mixing regimes to maximize conversion and control crystal formation. Some downstream modifications, such as granulation or partial neutralization, require process-specific additive dosing or pH control.
Derivatives & Downstream Products
Superphosphate acts as a strategic intermediary for higher-grade phosphates and specialty blends. Modification potential exists for tailored fertilizer grades, or phosphate intermediates in detergent, water treatment, or food additive streams. Quality of the precursor impacts downstream output purity and performance.
Storage & Shelf Life
Storage Conditions
Production storage requires dry, well-ventilated environments, with temperature and humidity constraints dependent on product grade. Granules resist caking under low humidity. Prolonged moisture contact risks hydrolysis and bulk solidification. UV exposure does not typically degrade phosphate but may affect packaging integrity.
Container Compatibility
Both polyethylene-lined sacks and bulk bins, designed for mild acid resistance, provide primary containment. Direct exposure of metallic containers leads to surface rust or corrosion, especially for products with elevated free acid levels. Transitioning between storage methods calls for cleaning protocols to avoid cross-contamination.
Shelf Life & Degradation Signs
Shelf life is determined chiefly by moisture ingress. Early aggregation or hardening signals exposure or packaging failure. Observed color changes or odor shifts can indicate acid corrosion or microbiological activity, which can render product incompatible with precision application systems.
Safety & Toxicity Profile
GHS Classification
Calcium superphosphate's safety classification depends on free acid and trace metal content in the finished product. Products with low residual acid typically carry lower acute hazard designations. National requirements take precedence—a manufacturer’s compliance file incorporates the latest regional updates as regulations shift.
Hazard & Precautionary Statements
Standard statements highlight the risk of eye and skin irritation, particularly from dust or accidental contact with exposed mucous membranes. Ongoing air quality control in production, and ventilation in storage, limit personal exposure risk. Direct discharge to water bodies must be avoided due to local eutrophication hazard potential.
Toxicity Data, Exposure Limits & Handling
Workplace exposure guidelines focus on airborne particulate and acid mist; recommended handling procedures include the use of basic PPE, with training to reinforce proper response to accidental contact. Monitoring procedures check for cumulative exposure risk from chronic dust inhalation. Technical documentation for each batch includes reference to the dominant impurity profile, giving downstream processors information for their own risk assessments.
Calcium Superphosphate: Supply Capacity, Commercial Terms & 2026 Price Trend Forecast
Supply Capacity & Commercial Terms
Production Capacity & Availability
Annual output fluctuates depending on phosphate rock access and production scheduling. At the plant level, output capacity aligns with installed kilns, reactor throughput, and acidulation equipment. Short-term availability tracks raw material deliveries and operational days: if the phosphate rock grade or sulfuric acid purity fluctuates, weekly volumes can vary. Peak demand periods (regional planting seasons) push some facilities to run continuous shifts, but unplanned downtime from scale formation or corrosion can lower available stock. Real-world capacity is rarely a fixed number on paper—product grade, storage logistics, and raw input quality control drive how much supply can be released without backlog.
Lead Time & MOQ
Lead times shift based on grade purity, packaging format, and current backlog. Commodity bulk shipments for direct application in agriculture usually clear to dispatch within one to two weeks if production is stable and analysis passes on first attempt. Specialty grades or compounded forms (such as with anti-caking treatment or micronutrient enrichment) extend lead times due to additional QC and blending steps. Minimum order quantities link to packaging and production batch sizes—bulk loose product for vessel shipment has a higher MOQ than bagged or palletized forms prepared for smaller distributors. Special formulations or private-labeled lots can require both larger MOQ and extended scheduling.
Packaging Options
Packaging reflects market and downstream equipment compatibility. Bulk, liner-free containers fit regional bulk spreaders, but industrial customers in food or pharmaceutical intermediates often specify lined FIBCs or HDPE-lined bags for moisture control. Small-particle grades destined for horticulture or specialty retail outlets use multi-wall paper sacks or laminated PE bags, typically with anti-caking additive included. Packaging selection carries operational consequences: poorly ventilated bags can lead to caking or compaction, especially during high-humidity storage or long-haul shipping.
Shipping & Payment Terms
Shipment terms respond to buyer location, market risk, and seasonality. Export buyers in regions lacking deep-water ports often require multi-modal routes, swinging total delivered cost and handoff liability. Standard industry payment conventions cover a range from L/C on shipment to time-based payment against documents; credit terms reflect prior relationship and risk profile. For some regions, compliance with country-of-origin labeling or certification requirement at port impacts both lead time and document provision.
Pricing Structure & Influencing Factors
Raw Material Cost Composition & Fluctuation Causes
Raw material outlay is led by phosphate rock feedstock and sulfuric acid price, with fuel, power, and water treatment significant for some regions. Input-grade purity directly affects usable product yield and waste neutralization burden. Phosphate rock cost swings stem from global mining output shifts, regional export rules (notably from Northern Africa and China), and logistics bottlenecks. Sulfuric acid price tracks broader sulfur markets and, in some jurisdictions, emissions controls or cap-and-trade impacts. Fluctuating energy prices amplify cost volatility, especially if production energy intensity is high and power is locally priced.
Compliance With Graded Price Differences
Price brackets reflect grade (available P content, impurity spectrum), physical form (powder, granule, special blend), and package spec. Agriculture-facing bulk blends price lower than high-purity, trace-metal controlled lots for industrial or horticultural use. Packing certification—such as compliance with specific heavy metal thresholds for developed economies—raises both direct QC cost and market value due to compliance cost absorption. Premium for certified grades magnifies during periods of active regulatory inspection or market audit cycles.
Factors Behind Raw Material Price Fluctuations
Input prices respond to region-specific shifts in extraction policy, export policy change in major phosphate rock-producing countries, seasonal mining interruptions, sulfur or sulfuric acid trade tensions, and shipping freight index variation. Environmental enforcement at mining or processing sites can temporarily constrain input flow, especially near protected water tables or in drought-affected mining zones.
Product Price Difference—The Core Influence of Grade, Purity, and Packaging Certification
Grade influences price band: high-P, low-heavy-metal spec costs more at raw material and downstream QC. Purity drives not only market value but also storage and blending tendencies, since off-grade batches mean increased caking risk or application rate deviation. Packaging with moisture barrier or international transport certification commands higher per-tonne pricing, both for direct cost of material and covered liability.
Global Market Analysis & Price Trends
Global Supply & Demand Overview
Export-driven markets rely on steady flows from major producers (notably China, India, US), with emerging demand growth in Sub-Saharan Africa and Southeast Asia. Supply and demand respond differently by region to climate events, local agricultural policy shifts, and input cost cycle: bumper crop years tighten local supply and lift prices, while low corn or wheat prices can see inventories build and spot prices soften.
Key Economies Analysis (US, EU, JP, IN, CN)
US buyers tend to contract by season and specify domestic or NAFTA origin, limiting imported share except during local outages. EU regulation pressures shift procurement to higher-compliance lots, driving premium for low-cadmium phosphate and traceability. Japan, with industrial demand held steady, emphasizes stable certification and traceable chain-of-custody. India combines price sensitivity with bulk government purchasing cycles—which regularly introduce volatility in regional pricing. China’s dual role as major exporter and self-consumer means internal shifts in export incentives or environmental policy ripple into world pricing and availability.
2026 Price Trend Forecast
By 2026, trend lines face upward pressure if input costs climb or new compliance rulings arrive in key markets. Export policy shifts from China, new resource taxes, or expanded environmental rules are the main uncertainty factors. Strong agricultural commodity prices encourage higher application, tightening supply. Pricing will increasingly sort by grade, with stricter purity compliance and sustainability disclosure requirements leading to steeper grade spreads during periods of limited supply.
Data Sources & Methodology
Analysis informed by internal production statistics, third-party industry reports, and aggregated spot market indices covering raw input and finished product markets across major producing and consuming regions. Real-time batch and input monitoring feeds into forecast models; regional compliance and trade policy updates tracked through official regulatory bulletins and market association briefings.
Industry News & Regulatory Updates
Recent Market Developments
Producers realign output scheduling in response to multi-national supply initiatives and expanded government procurement orders. Instances of port congestion and local transport disruption following weather emergencies have led to temporary backlogs and minor price surges in distribution-centric markets.
Regulatory Compliance Updates
Recent years brought stricter trace metal reporting and maximum contaminant level enforcement in both production and export markets. EU buyers now require compliance documentation for heavy metal thresholds and persistent organic pollutant screening on incoming lots, which has increased the verification workload and at times altered shipment scheduling.
Supplier Response & Mitigation
Facilities invest in expanded traceability systems, refine input selection for lower impurity risk, and upgrade containment on loading and packaging lines to match buyer audit criteria. Production teams actively monitor input shift and implement contingency scheduling during raw material price spikes or shipping interruptions, holding emergency stock to maintain contract continuity.
Application Fields & Grade Selection Guide for Calcium Superphosphate
Industry Applications
Calcium superphosphate originates in our fertilizer segment, but reaches into several downstream industries due to its phosphate content and reactivity profile. The traditional mainstay has always been agricultural fertilizer. Beyond this, users in hydrometallurgy rely on it as a phosphate donor in ore treatment, animal feed companies select it for controlled calcium and phosphate supplementation, and in construction, select formulations support gypsum or cementitious additives. Grade selection requires careful attention to application: availability of soluble phosphate, impurity tolerance, and granulation all vary by end use.
Grade-to-Application Mapping
| Application | Preferred Grade | Key Parameters |
|---|---|---|
| Crop Fertilizer | Granular or Powdered Agricultural Grade | Available P2O5 content, moisture content, reactivity, sizing |
| Animal Feed Additive | Feed Grade | Purity, specific soluble phosphorus, low heavy metal (Pb, Cd, As) content |
| Industrial Processing (Hydrometallurgy, Flotation) | Technical Grade | Reactivity, ratio of available P to Ca, impurity spectrum |
| Construction Additives | Low-Silica, Low-Impurity Grades | Sulfate level, particle size distribution, presence of free acid |
Key Parameters by Application
The phosphate source's suitability hinges on available P2O5 and on impurity management. Agricultural use generally tolerates moderate impurity levels if heavy metals are tracked below regulatory thresholds. Feed grades involve both stricter process control—raw inputs require explicit heavy metal screening—and additional purification steps. Industrial or construction users often focus on consistency in sulfate balance and particle size, since any surge from batch variability impacts downstream batch performance or material compatibility.
From an operator’s view, every application applies different quality levers. In fertilizer blending, dust content influences handling losses and blend performance. In feed, batch-to-batch uniformity prevents nutritional deviations. Technical applications observe batch reactivity and byproduct formation in downstream chemistry.
How to Select the Right Grade
Step 1: Define Application
Establish target use—fertilizer, feed supplement, chemical precursor, or building material. Each segment expects precise specification alignment and consistent delivery. Fertilizers focus on available nutrients and product flow; feed firms audit for purity and bioavailability; technical operations monitor chemical reactivity and byproduct control.
Step 2: Identify Regulatory Requirements
Check the applicable local, national, or contract-specific standards for heavy metals, pathogens, and residue limits. Feed and food-facing applications often mandate screening for certain metals, dioxins, or organic contaminants. Fertilizer grades must meet the local agricultural ministry’s standards. Manufacturer quality teams maintain compliance by running batch certifications tied to applicable rulesets.
Step 3: Evaluate Purity Needs
Grades differ in impurity profiles due to raw mineral supply and purification approach. For animal feed, impurities like fluorides and heavy metals require regular tracking—in-line or by batch release. Industrial grades prioritize process compatibility and reactivity over nutritional safety, so selection weighs batch reactivity consistency and known impurity carryover. Purity-driven logic extends to raw phosphate source selection and subsequent cleaning or neutralization steps.
Step 4: Consider Volume & Budget
Usage scale directly impacts grade selection—a bulk fertilizer customer tolerates broader spec bands to drive down per-ton costs. Feed and niche technical users demand narrow bands for controlled outcomes even at higher price points. Manufacturer pricing structures reflect both the complexity of impurity controls and purification requirements alongside volume discounts. Planning teams match planned demand with feasible grades to avoid bottlenecks or overpaying for over-specified product.
Step 5: Request Sample for Validation
Always request representative batch samples before final bulk order confirmation. Validation includes not just on-paper specification checks, but practical trials—blending, reaction, or formulation—under real process conditions. Manufacturer QA tracks sample release through internal batch records, ensuring that certified lots reflect ongoing process conditions and source batch stability. Field results inform final grade lock-in and may prompt custom specification adjustments for future lots.
Trust & Compliance: Quality Certifications & Procurement Support for Calcium Superphosphate
Quality Compliance & Certifications
Quality Management Certifications
As a chemical producer supplying calcium superphosphate for industrial and agricultural use, certification of our management systems always starts with internationally recognized standards. Yearly third-party audits maintain our active registrations for ISO 9001 and related management systems. Internal quality teams track nonconformance data, corrective actions, and process deviations. Production lines remain under continuous supervision from intake of phosphate rock and sulfuric acid through to finished bagging. Process control documentation and calibration routines fall under this system’s strict periodic review.
Product-Specific Certifications
Our calcium superphosphate supports food-chain safety, fertilizer registration, and environmental stewardship programs. Grade selection dictates registration process and the set of required compliance tests. For technical-grade or fertilizer-grade, the product meets market-specific national standards—compliance documents such as soil additive approvals or heavy metal content reports are tied to batch and route. Upon request, our shipper collects samples at the point of dispatch for traceable third-party testing.
Industrial and agricultural clients may require documentation for country-specific import, labeling, or health and safety disclosure. We archive certificates of analysis and regulatory attestation statements for every shipment, available to end-users, regulators, or downstream partners as part of batch history retrieval.
Documentation & Reports
We supply a chain-of-custody record and batch-level certificates of analysis with each shipment. The documents include analytical test outcomes for phosphorus content, water solubility, particle size distribution, and, when requested, trace element profiles. Retention samples are maintained under controlled storage for as long as the market standard dictates.
Any deviation, whether in appearance, flow properties, or lab results, triggers internal review and potential retesting before shipment release. Environmental data and hazard documentation align with global transport regulations and national chemical inventory rules—the substances list changes regularly, so technical teams audit their labels and SDS updates each cycle.
Purchase Cooperation Instructions
Stable Production Capacity Supply and Flexible Business Cooperation Plan
Consistent output defines our plant design and production scheduling. Sourcing starts from tightly specified phosphate ore, with contingency reserves in place for feedstock variation. Output levels can ramp up or down over several weeks in line with contract volumes. We keep open production slots for off-schedule or spot requirements, but annual contract partners receive scheduling priority. Business partners benefit from planned production reviews—quarterly or semi-annual meetings help align shipment forecasts and inventory planning.
Core Production Capacity and Stable Supply Capability
Peak season demand in agricultural markets or regional spikes in industrial use require advance coordination. Our finished goods warehouse integrates with ERP tracking to ensure unbroken supply chain visibility, from manufacture to shipping. Emergency scheduling blocks and shift adjustments allow for surge requests. During transit disruptions, logistics teams arrange buffer stocks near key customer regions. Production constraints—such as supply interruptions for phosphate rock or plant maintenance scenarios—trigger rapid risk assessments and mitigation action.
Sample Application Process
Clients seeking sampling for product qualification submit grade, volume, and application information to our technical service department. The technical team reviews application intent—agricultural, industrial, or feedstock use—then nominates the representative product grade or blend. Sampling procedures at the plant are documented, with sealed samples shipped under chain-of-custody tracking. Analytical data accompanies the sample, along with grading proposals tailored to target use. Feedback cycles with clients aid in refining the match between supplied sample and downstream process needs.
Detailed Explanation of Flexible Cooperation Mode
We support several partnership structures. Contract models range from fixed-term, volume-based supply to ad-hoc delivery linked to project schedules or growing seasons. Customized logistics arrangements and direct plant-to-site delivery are available for clients facing cost pressures or regulatory bottlenecks. Volume threshold agreements enable clients with more variable usage to smooth fluctuations without penalty. Technical service lines remain on-call to troubleshoot during customer trials or scaling exercises; interim specifications may be negotiated when customers are developing new downstream applications demanding modified release parameters.
Market Forecast & Technical Support System for Calcium Superphosphate
Research & Development Trends
Current R&D Hotspots
In calcium superphosphate production, current R&D efforts focus heavily on increasing phosphorus availability while minimizing soluble impurity build-up in both the finished product and process waste streams. Enhanced reactivity of feedstock phosphate rock, acidulation efficiency, and energy-reduction strategies attract technical scrutiny. Researchers track trace element solubility during both wet and dry route processing, since batch-to-batch variation often appears in the downstream granulation stage.
Emerging Applications
Besides traditional bulk fertilizer blends, R&D explores customized particulate formulations for controlled-release applications and soil-specific pH adaptation. Recent project collaborations with agri-tech providers have prompted development of grades intended for fertigation systems and row-specific microdosing. Research teams continue investigating compatibility with micronutrient fortification and integration into biostimulant-enriched blends, subject to regional agronomic guidance and local regulatory environments.
Technical Challenges & Breakthroughs
One persistent challenge remains the control and reduction of heavy metal impurities originating from low-grade raw rock. Additional in-process filtration steps, alternate sources of rock phosphate, and neutralization adjustments are the main technical lines pursued to mitigate these issues in high-purity requirements. Recent advances in process automation have allowed for tighter control at the acidulation and curing stages, directly reducing batch variation and the risk of physical agglomeration due to uncontrolled exothermic events or local overdosing of process acid.
Future Outlook
Market Forecast (3–5 Years)
Market demand for calcium superphosphate is expected to track regional phosphate fertilizer policies, particularly in areas with mature regulatory frameworks governing nutrient runoff and soil phosphorus management. Growth will likely favor value-added variants, including those with micronutrient co-formulation, integrated stabilizers, or forms designed for automated spreading systems. Buyers increasingly seek fully traceable product lots with documented origin and impurity management records, especially for use in high-value crops or export-sensitive supply chains.
Technological Evolution
Technical workflows continue shifting toward closed-loop manufacturing, with a greater focus on byproduct collection and waste acid recovery. Manufacturing lines move toward modular, digitally monitored systems, which allow for on-the-fly grade adjustment and rapid root-cause analysis of off-spec batches. Advanced filtration and process segregation yield more consistent product properties, contributing to reduced frequency of unwanted agglomeration and off-types such as excessively dusty or caked material.
Sustainability & Green Chemistry
Continuous reduction of process water consumption and adoption of low-impact acidulators mark the direction for sustainability upgrades. Select facilities trial use of reclaimed sulfuric acid and secondary sources of phosphate rock as part of a circular raw material sourcing program. The design of operations increasingly targets energy intensity per tonne of finished product, with demand-side signals pushing for lower embedded carbon. Environmental compliance monitoring for stack emissions and process effluent signatures forms a required reporting backbone, particularly for facilities operating in or near sensitive catchment zones.
Technical Support & After-Sales Service
Technical Consultation
Technical service teams are available for batch assessment, application troubleshooting, and advice on product suitability relative to soil, crop, and equipment type. Support includes review of field trial results, analysis of application method, and guidance on minimizing fertilizer interaction or phytotoxicity, especially where multi-source blends are involved. Customized support is offered for clients with unique downstream processing or storage needs, including insight into caking resistance, shelf stability, and onsite blending protocols.
Application Optimization Support
Onsite guidance may involve tuning application rates, identifying optimal blending partners, or evaluating compatibility with anti-dust or anti-cake additives. For automated handling environments, support addresses common feed issues such as bridging or inconsistent flow related to local humidity or product particle size distribution. Where specialized dispersion or solubilization is required, technical representatives have access to recent in-house test lots to support specific farmer or processor questions about settling, runoff minimization, or micronutrient co-application risk.
After-Sales Commitment
All sales batches are backed by archival batch records and retention samples for traceability. Product complaints are routed via technical and quality control teams, with transparent root-cause investigation protocols that draw on in-house analytics and customer-supplied field samples. Ongoing application feedback is encouraged and supports iterative process improvement, feeding directly into process adjustments and grade development. Consistent with manufacturer QC requirements, every batch leaves the plant meeting the spec profile agreed to with the customer, subject to quality agreements and any local registration criteria.
Direct Manufacturing of Calcium Superphosphate for Industrial Applications
Producing calcium superphosphate involves a controlled process that uses phosphate rock and sulfuric acid to yield a product with consistent soluble phosphorus content. Each production batch is monitored for chemical balance, physical granule stability, and absence of impurities that may disrupt downstream production for our industrial partners. Our facility supplies both powdered and granulated grades suited for straightforward integration into commercial fertilizer lines, animal feed, soil amendments, and specialty blends for industry sectors that require precise phosphorus sources.
Key Industry Applications
Manufacturers in agriculture rely on calcium superphosphate as a primary phosphorus supplement for bulk blending and compound fertilizer production. Feed producers implement our grades as a nutritional additive, supporting livestock growth and health by addressing regional phosphorus deficiencies. Producers of soil conditioners, landscape products, and specialty mineral supplements value the material’s reactivity and purity, which eliminates unnecessary process steps. Glass and ceramics fabrication lines utilize our grade for flux and mineral content management.
Control Over Product Consistency and Quality
Every shipping lot receives full chemical analysis to verify phosphorus concentration, water solubility ratio, and particle characteristics. QA teams collect samples directly from production streams to ensure each analysis represents true output. Our laboratory maintains calibrated instrumentation according to national and global standards for phosphorus fertilizer, and data from ongoing batches drive real-time process adjustments.
Packaging and Supply Capability
Our plant operates automated packaging solutions, offering bulk bags, 25kg sacks, and custom packaging upon request. Enclosed bagging lines prevent moisture ingress and cross-material contamination. Palletized and containerized shipments leave the facility with tamper-proof documentation and traceable batch codes. Logistics capacity aligns to both seasonal and year-round procurement patterns, supporting direct shipments to ports, warehouses, and industrial blending sites.
Technical Support for Industrial Buyers
Our technical support engineers advise on compatibility with acidulation systems, blending lines, and storage solutions. Assistance includes adjustment of feeder rates for metering and suggestions for integration into automated batching operations. Field representatives coordinate with engineering and procurement departments to support commissioning of new lines that use our product or when buyers seek process modifications to match material specifications.
Business Value for Industrial Partners
Procurement teams and formulators drive efficiency when reliable product specification removes the need for batch requalification or costly reprocessing. Commercial buyers who manage vertically integrated fertilizer or feed production reduce supply interruptions by leveraging our direct control over inventory and packing schedules. Our manufacturing approach helps distributors meet regulatory compliance, optimize warehousing, and lower landed cost. Ongoing collaboration with buyers enables advance production scheduling to match market shifts or planned maintenance periods, ensuring uninterrupted supply at scale.
Industrial FAQ
What is the chemical composition and typical phosphorus content of Calcium Superphosphate fertilizer?
Understanding the Formula and Production
As a producer specializing in phosphate fertilizers, we manufacture calcium superphosphate through a controlled reaction between finely milled phosphate rock and sulfuric acid. The end product contains monocalcium phosphate (Ca(H2PO4)2), gypsum (CaSO4·2H2O), and a range of minor soluble phosphates. Our multi-decade experience with consistent quality control tightens the variation in end composition. Producers observe our process for its reliability and our response to raw material fluctuations contributes to a steady chemical profile.
Phosphorus Content That Matters in the Field
Agronomic results always link back to available phosphorus. Calcium superphosphate offers phosphorus in a form that crops can take up during their growth periods. Our typical material provides a total phosphorus pentoxide (P2O5) content ranging from 16% to 22%, measured by well-established analytical methods like those outlined in GB and ISO fertilizer standards.Rather than focusing only on lab numbers, our technical team checks plant-available phosphorus using actual soil solution solubility and field retrieval studies. In practical terms, more than 90% of total phosphorus in our superphosphate stays water-soluble, translating directly to nutritional value in commercial farms and specialty horticulture.
Key Minor Constituents and Their Relevance
Besides soluble phosphate, the fertilizer also introduces secondary nutrients and limited trace elements. Our monitoring at multiple production stages confirms measured contents of calcium, which hovers between 17% and 20% as Ca, depending on phosphate rock origin, and measurable sulfur content due to gypsum formation. Silicon, magnesium, and iron trace levels reflect the minerology of the raw material and do not rise to levels that would interfere with normal use.These minor constituents serve a dual purpose: they offer some plant nutrition, while their inert mineral forms protect the granule against quick dissolution losses during storage and transportation.
Quality Assurance and Field Performance
Our plant runs continuous phosphate analysis for both finished product and intermediate streams—checking not just P2O5 but also for unreacted phosphate and oversulfation. Every hopper is sampled using techniques recognized by the Chinese Fertilizer Quality Standardization Program and verified by third-party labs when required by export clients. This close monitoring mitigates the issues of phosphate fixation in soils. We support clients with best practice guidelines for application based on our direct experience with different soils and climates.
Practical Insight on Use and Reliability
A single bag takes years of knowhow, not just chemistry. Superphosphate users rely on product consistency—any deviation in phosphorus content can translate into lower yields or fertilizer burn. Our engineers, who supervise each batch, maintain strict granule size control and limit residual acid.Our granular and powdered forms serve both mechanized spreading and precision sowing in drip irrigation systems. Each shipment is traceable. Customers get batch analysis certificates on request.
We continually invest in process upgrades and staff training to raise our product’s agronomic effectiveness. Reliable phosphorus content and predictable chemistry keep our customers confident in each season’s results.What are the available packaging sizes and minimum order quantities for Calcium Superphosphate?
From the production floor to our clients’ facilities, we keep packaging practical and transport costs under control. Most of our calcium superphosphate ships in classic woven polypropylene bags, each lined with inner film for moisture resistance. The most typical bag size is 50 kilograms. Over decades of experience, we found this weight easy to handle on packing lines, durable in bulk storage, and reliable during shipping by road, rail, or container. Our loaders and packing crew can fill these bags at high speed while keeping dust loss down and clean-out simple.
Larger shipments, especially for clients operating granulation towers or blending plants, often call for flexible intermediate bulk containers. These FIBCs — better known as “big bags” — typically hold 1,000 kilograms each. By moving from stacked bags to FIBCs, users trim manual handling, speed up warehouse logistics, and see lower per-tonne packaging costs. We introduced these larger bags after direct requests from bulk customers. FIBCs now make up a significant share of our total tonnage, headed for direct use or for further formulation on site.
For full truckloads, we generally dispatch either 20 metric tons of bagged product, or up to 24 tons if loading into FIBCs. Full-container loads, destined for export or coastal domestic shipping, load efficiently with either 400 x 50 kg bags or 24 FIBCs per 20-foot shipping container. Our logistics team maintains packaging strength specifications and clear stacking diagrams to minimize any risk of breakage or shipping loss.
The choice between 50 kg bags and 1,000 kg FIBCs isn’t just about warehouse efficiency. Regulations in some regions set upper handling limits for single pallets or bags, particularly where manual lifting dominates. For government tenders, cooperative procurement, or retail repackaging, we keep multiple packing lines adaptable to high-frequency, smaller-batch packing. We’ve also responded to custom packaging requests over the years, such as 25 kg sacks for smaller distributors, or specialized export cartons where import rules dictate specific labelling or film thickness.
Minimum Order Quantities
We’ve set our minimum order at one full pallet. For 50 kg bags, this usually means 40 bags, or 2,000 kg. In FIBCs, minimum shipment is one bag, which holds 1,000 kg, but our most economical freight rates start at four FIBCs. Bulk transport — by truck or railcar hopper — opens only for clients purchasing full truckloads or railcars, which makes sense to both parties for cost and logistics reasons.
Experience shows that consistent minimum order quantities reduce processing congestion, guarantee bagging uniformity, and limit transport inefficiencies. Small orders, especially single-bag shipments, tend to drive up handling costs and complicate both documentation and traceability. In some special projects, such as field demonstration lots or small commercial trials, we work with established clients to accommodate smaller packaging or pallet quantities.
Our technical and customer logistics teams stay involved with each contract, reviewing delivery location constraints, offloading facilities, and local regulations to recommend the most economical, compliant, and reliable option.
By focusing on our client’s operational realities and learning from field feedback, we keep our calcium superphosphate packaging sizes and minimum order policies clear, sensible, and grounded in our years of direct manufacturing experience.
What are the shipping regulations and documentation requirements for international transport of Calcium Superphosphate?
From the production floor to the shipping dock, handling the international movement of Calcium Superphosphate requires more than just reliable packaging and consistent batch quality. Our business depends on getting this essential fertilizer component across borders efficiently and safely, meeting the requirements of diverse regulatory systems.
Shipping Classifications and Compliance
Calcium Superphosphate is classified as a non-dangerous good by global shipping authorities, but regulatory oversight still impacts how we move each load. Authorities like the International Maritime Organization (IMO) and shipping operators require accurate product classification under the IMDG Code for ocean freight. Whether it's packaged in bags, big bags, or bulk, we assign the appropriate UN number (if applicable) and full product name as per shipping documents.
Our technical team tracks changes in international transport regulations that affect phosphate-based fertilizers. Some markets face evolving demands for traceability and tighter scrutiny at customs. Strict compliance with local laws means our export documentation must clearly state the chemical composition, percentage of available phosphorus, and manufacturing origin. For certain jurisdictions, shipments undergo additional checks for contaminants such as heavy metals, and results are certified in advance.
Bill of Lading and Supporting Documents
Every international shipment we arrange is accompanied by a Bill of Lading. This document not only covers the contract of carriage but serves as a receipt of goods and proof of title. The cargo description references the precise grade and packaging—our standard for all clients, whether the order fills an entire vessel or moves as containerized freight. Accuracy here minimizes delays at transit ports, especially where authorities prioritize detailed declarations.
Shipping manifests, export declarations, and commercial invoices complete the bundle of core documents. Each invoice specifies the batch number, product quality grade, gross and net weights, and harmonized tariff code. Certificate of Origin comes into play when the receiving country calls for proof that our Calcium Superphosphate arises from our facility.
Safety Data Sheets and Lab Certification
We issue up-to-date Safety Data Sheets (SDS) with each new client or upon request. These SDS documents cover chemical composition, safe handling instructions, and storage advice, following Globally Harmonized System (GHS) standards—essential for customs clearance and workplace safety audits. In some markets, border agencies or downstream users require original lab test certificates. Our laboratory provides these, reporting on soluble phosphorus, calcium content, and any requested physical parameters.
Packaging Markings
Our bags and bulk containers display compulsory markings such as product name, net weight, manufacturer’s name, batch number, and handling instructions. Durable labeling ensures that information remains visible through the entire journey, allowing warehouse staff and customs inspectors to match goods against shipping documents without confusion. This matters, especially in regions where unmarked or mislabeled chemical shipments face stiff penalties or outright rejection at the port.
Customs Clearance and Local Requirements
Exporting to different regions means facing an array of documentation requirements tied to local crop safety rules, anti-dumping measures, or environmental controls. Over the years, we have built documentation processes that support rapid customs clearance, from pre-checking destination certificates to providing analytical reports upon demand. By working closely with our logistics partners and using digital documentation where available, we reduce clearance times and avoid demurrage costs tied to missing or incomplete paperwork.
Continuous Review
Shipping regulations for chemical fertilizers evolve with international policy and local enforcement trends. We dedicate resources to monitoring updates and training our documentation staff. Our clients benefit from this diligence; they receive complete, regulator-ready paperwork with each shipment, reducing the risk of shipment holds or market returns. As new regulations arise, we address them proactively, making sure our shipments remain compliant and on schedule.
Technical Support & Inquiry
For product inquiries, sample requests, quotations or after-sales support, please feel free to contact me directly via sales7@bouling-chem.com, +8615371019725 or WhatsApp: +8615371019725