| Names | |
|---|---|
| Preferred IUPAC name | diammonium hydrogen phosphate |
| Other names | Ammonium hydrogen phosphate DAP Diammonium hydrogen phosphate Phosphoric acid diammonium salt |
| Pronunciation | /daɪˌæmˈəʊniəm ˈfæsfət/ |
| Identifiers | |
| CAS Number | 7783-28-0 |
| 3D model (JSmol) | `JSmol.loadInline("data/mol/Diammonium_phosphate.mol")` |
| Beilstein Reference | 1713883 |
| ChEBI | CHEBI:63029 |
| ChEMBL | CHEMBL1201573 |
| ChemSpider | 54651 |
| DrugBank | DB11420 |
| ECHA InfoCard | ECHA InfoCard: "03-2119488166-29-0000 |
| EC Number | 231-987-8 |
| Gmelin Reference | 14361 |
| KEGG | C01779 |
| MeSH | Dihydrogenphosphate, diammonium |
| PubChem CID | 1032 |
| RTECS number | BQ9625000 |
| UNII | 7Q1210U5YW |
| UN number | UN2061 |
| Properties | |
| Chemical formula | (NH4)2HPO4 |
| Molar mass | 132.06 g/mol |
| Appearance | White or colorless crystalline solid |
| Odor | Odorless |
| Density | 1.62 g/cm³ |
| Solubility in water | 570 g/L (20 °C) |
| log P | -2.0 |
| Vapor pressure | Negligible |
| Acidity (pKa) | pKa ≈ 7.2 (for the dihydrogen phosphate ion) |
| Basicity (pKb) | 2.98 |
| Magnetic susceptibility (χ) | −75×10⁻⁶ cm³/mol |
| Refractive index (nD) | 1.52 |
| Dipole moment | 2.99 D |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 99.7 J·mol⁻¹·K⁻¹ |
| Std enthalpy of formation (ΔfH⦵298) | -1690 kJ/mol |
| Std enthalpy of combustion (ΔcH⦵298) | -252 kcal/mol |
| Pharmacology | |
| ATC code | V04CX04 |
| Hazards | |
| Main hazards | May cause respiratory irritation. Causes serious eye irritation. |
| GHS labelling | GHS07, GHS09 |
| Pictograms | GHS03,GHS07,GHS09 |
| Signal word | Warning |
| Hazard statements | H319: Causes serious eye irritation. |
| Precautionary statements | Keep out of reach of children. Read label before use. Avoid breathing dust. Wash hands thoroughly after handling. Do not eat, drink or smoke when using this product. Wear protective gloves/protective clothing/eye protection/face protection. |
| NFPA 704 (fire diamond) | 2-0-0 |
| Explosive limits | Not explosive |
| Lethal dose or concentration | LD50 (oral, rat): 6,500 mg/kg |
| LD50 (median dose) | LD50 (oral, rat): 6,500 mg/kg |
| NIOSH | WL4375000 |
| PEL (Permissible) | PEL (Permissible Exposure Limit) for Diammonium Phosphate: 15 mg/m³ (total dust), 5 mg/m³ (respirable fraction) |
| REL (Recommended) | 16-21-0 |
| Related compounds | |
| Related compounds | Monoammonium phosphate Ammonium polyphosphate Phosphoric acid Ammonium nitrate |
| Parameter | Detail | Manufacturer Insight |
|---|---|---|
| Product Name & IUPAC Name | Diammonium Phosphate / Diammonium hydrogen phosphate | The name Diammonium Phosphate is used for both technical and agricultural grades. The IUPAC nomenclature supports clear identification in REACH and for labelling, avoiding confusion across regional standards. |
| Chemical Formula | (NH4)2HPO4 | Batch-to-batch manufacturing maintains stoichiometry through precise ammonia addition. The phosphate source and grade (rock, purified acid) influence impurity profiles, especially for food, feed, or electronic applications. |
| CAS Number | 7783-28-0 | CAS assignment supports regulatory documentation and traceability through global supply chains. For export control, internal systems match CAS to grade-specific compliance reports. |
| Synonyms & Trade Names | Ammonium phosphate dibasic, DAP, Diammonium hydrogen orthophosphate | Trade names and synonyms vary by market and industry. In technical documentation these terms are linked to product grades. Fertilizer, industrial, and food-grade DAP follow different downstream use patterns and labeling conventions. |
| HS Code & Customs Classification | 310530 | HS 310530 covers diammonium phosphate as a mineral or chemical fertilizer. Customs classification depends not only on composition but also packaging, end-use declaration, and impurity disclosure per local regulations. Some regions require grade-specific HS annotations, especially for agricultural versus technical DAP. |
Diammonium phosphate production hinges on tight control of ammonia-to-phosphoric acid reaction, ensuring minimal free acid and consistent pH range. Inconsistencies in raw phosphoric acid can introduce calcium or magnesium as trace impurities, which impact solubility—especially in grades intended for high-purity applications.
Grade selection is dictated by customer requirements. Fertilizer-grade DAP tolerates higher levels of metallic impurities, while food and technical grades require closer monitoring and, if necessary, further purification to meet downstream demands. For electronic chemicals or tailored industrial users, product passes additional filtration or recrystallization.
Packing and customs documentation tie directly to product grade and destination market. Customers and regulators expect traceability to batch records, which record in-process analytical results for nutrients, moisture, and key contaminants. Packaging lot traceability also helps manage recalls or compliance checks, especially where export markets impose their own specification validation schemes.
Manufacturing manages batch-to-batch consistency through automated dosing and continuous sampling, with deviations investigated by both production and quality teams. Release of each lot aligns with customer-specific standards or, where these are not specified, with internal minimum release requirements established through risk and compliance audits.
Diammonium phosphate (DAP) commonly appears as white or off-white crystalline material or granules. Bulk shipments can exhibit minor variations in color due to raw material source, particle size, and process settings. The product shows no characteristic odor in most industrial grades. Melting point and moisture uptake behavior depend on grade, manufacturing route, and storage conditions. Hygroscopicity varies: finer powders and high-solubility grades absorb moisture faster, impacting flowability during handling and storage. Bulk density shifts with granulation—denser, more spherical granules manage better in automated feeding but may differ in dissolution rates.
Chemical stability arises from its ammonium phosphate lattice; decomposition starts under elevated temperature or acidic/basic contact. The salt remains stable under typical dry storage. Undesired reactivity increases around oxidizing agents or strong acids/bases—prompting dusting and possible ammonia release. Manufacturers must consider process and storage area ventilation, especially where temperature fluctuations occur.
Solubility in water remains grade-dependent and influenced by crystal modifications. Nutritional and technical grades, with fewer impurities or anti-caking agents, dissolve readily. Preparation of stock solutions for fertigation or feed blending requires staged dosing and agitation to minimize clumping, especially in cold water or high-concentration recipes where precipitation risk rises. The solubilization rate affects continuous processes, especially in automated plant dosing or inline mixing.
Key parameters—P2O5 content, N content, moisture, pH, water insolubles—vary by grade. Industrial standards for agricultural and food applications specify minimum guarantees for each component. Customized grades might define particle size distribution, heavy metal limits, or anti-caking performance per region or application. The precise table of specifications, including maximum impurity content, follows the customer or regulatory requirements for the destination market.
Impurity levels depend on both raw material purity and process control. Key trace elements (chlorides, sulfates, metals) must be controlled due to their impact on end use (e.g., fertilizer burn, feed safety). Routine monitoring targets known process contaminants—iron, arsenic, cadmium—requiring origin-specific management (e.g., phosphate rock source selection, upstream water quality).
Quality parameters follow internal protocols aligning with published methods (ISO, ASTM, local standards), customized to factory control realities. Wet chemical analysis and potentiometric titration dominate for content testing; trace analysis typically uses ICP-OES or AAS. The final release standard combines in-process controls with batch end-point validation adjusted for market-specific compliance.
Manufacturers select phosphoric acid and ammonia streams based on grade requirements, geographic accessibility, and impurity baseline. Acid quality has the largest single impact on final product profile and must match target downstream use (fertilizer, feed, technical grade).
DAP synthesis follows neutralization of phosphoric acid with ammonia. Reaction parameters (temperature, ammonia concentration, acid feed rate) directly affect ammonium phosphate speciation, final crystal structure, and bulk purity. Excess ammonia management requires careful vent handling and scrubbing. The reaction generates heat and off-gas, necessitating specialized closed-loop systems in modern plants.
Temperature and pH are the dominant control variables, affecting crystallization, impurity partitioning, and water content. Deviation from setpoints increases the risk for off-grade material: high impurity carryover, low conversion, or reduced storage stability. Solutions for off-spec batches include process recycle, blending, or controlled reprocessing.
Each batch, whether continuous or batch-synthesized, receives end-point quality tests (nutrient content, impurity levels, pH, flow). Ongoing monitoring addresses cumulative impurity build-up unique to each plant and region. Release for shipment hinges on both batch results and trend analysis from ongoing quality review.
Diammonium phosphate can act both as an acid buffer and a fertilizer input. Grade influences downstream reactions—high-purity technical grades support use in specialty chemicals or buffer formulations, while agricultural grades target nutrient delivery. In aqueous systems, DAP responds to acidic or basic additives by shifting ammonia and phosphate speciation.
No external catalyst is applied in typical production. The reaction proceeds at moderate temperatures, governed by exothermic heat management and crystallization kinetics. Solvent limitations arise primarily from water handling and product slurry concentration.
DAP is a precursor for complex fertilizers, polyphosphate mixes, and fire retardant formulations. Conversion routes generally involve further reaction with ammonia, addition of trace nutrients, or blending for multi-nutrient solutions.
Bulk and packed DAP require dry, covered conditions with stable temperature to avoid caking and moisture-driven hydrolysis. Humidity is the largest single risk factor, prompting regular warehouse monitoring and silo dehumidification in humid regions. Light exposure and air quality have minor impacts compared to moisture and temperature, but sealed containers or lined bags remain best practice against contamination or gas exchange.
Most industrial packaging uses polyethylene-lined bags or corrosion-resistant bins. Long-term compatibility testing remains important where recycled or specialty packaging enters use. Incompatible containers can drive product breakdown or introduce contaminants, a risk that rises with prolonged warehouse times or in field-blending sites.
Shelf life varies by granule size, packaging, and environment. Early signs of degradation—lumping, powdering, or ammonia odor—signal compromised performance, especially for grades used in high-precision applications or automated dosing systems.
Regulatory classification as per GHS focuses on irritation potential and aquatic effects. Most grades do not require labeling as toxic under normal handling but must address dust inhalation and environmental runoff concerns for bulk fertilizer use.
Site safety protocols include minimizing dust generation, using appropriate PPE in dusty environments, and providing adequate ventilation. Spill management focuses on avoiding runoff and diluted aqueous release to natural water courses.
Available toxicity data highlight low acute toxicity, but chronic exposure through dust inhalation or contaminated water requires attention, particularly for workers at unloading and packaging steps.
Internal standards define exposure baselines for total dust and ammonia content, matching national regulatory recommendations. Effective worker protection programs hinge on air monitoring, routine health checks, and engineering controls at points of raw material and final product transfer.
As a producer, total output of diammonium phosphate (DAP) depends on the integration level of key upstream inputs, control of the ammoniation process, and access to high-quality phosphate rock. Facility design defines theoretical capacity, but sustainable supply relies on regular preventive maintenance and access to uninterrupted utilities. During normal operations, production planning accounts for seasonality in fertilizer demand and export permit requirements, especially in high-volume periods dictated by agricultural calendar needs. Sudden regulatory export restrictions or raw material bottlenecks sometimes force the adjustment of allocation between domestic and international accounts.
Lead times align with on-hand inventory, campaign batch scheduling, and the complexity of customer product specifications. Standard grades produced for the main agricultural segment can often be filled from stock or scheduled with shorter cycle times. Orders for tailor-specified grades, such as those requiring low heavy-metal content or special anti-caking agents, require additional campaign planning and in-line verification, generally extending lead times. MOQ for DAP tends to reflect both shipping mode (container vs. bulk vessel) and the lot size practical for line transitions to minimize product cross-contamination.
Packaging format is defined by handling infrastructure and downstream application requirements. Bulk shipments dominate high-volume trade, especially for large fertilizer blenders and distributive warehouses. For smaller lot deliveries or premium technical grades (e.g., water-soluble formulations), packaging includes laminated woven bags, lined FIBCs, or specialized waterproof packaging. Physical protection during transit is an ongoing optimization, as product deliquescence remains a concern, particularly in humid environments.
Shipping is scheduled by shipment size, port capabilities, and country requirements for fumigation or pre-dispatch inspection. DAP’s nature as a regulated fertilizer brings security paperwork and customs scrutiny, particularly in sensitive jurisdictions. Payment terms reflect market risk, customer track record, and local credit availability. Pre-shipment payment prevails in new markets or higher-risk regions, while established offtakers might access open account options upon credit approval.
DAP pricing starts with the primary cost drivers: phosphate rock, ammonia, sulfuric acid, utilities, and freight. Ammonia price swings often dominate input cost volatility, influenced by natural gas trends and geopolitical disruptions in major production areas. Phosphate rock cost is tightly linked to resource control and environmental licensing, with global price sensitivity to export restrictions in Morocco, China, and new projects in Saudi Arabia. Sulfur and sulfuric acid reflect refinery output and overall commodity cycles.
Price separation in DAP market offers a direct view of grade, applied technology, and regulatory-driven requirements. Fertilizer grade, typically lower in purity and broader particle size range, carries lower cost due to faster production and reduced upstream purification. Water-soluble and technical grades command a premium for tighter impurity controls, smaller particle sizing, and enhanced trace element reduction, demanded by specialty crop or industrial users. Certification to low-cadmium or registered organic application standards adds laboratory and process validation costs. Granular vs. powder forms, and value-added coating or anti-caking treatments, affect both production complexity and resulting price.
DAP global flows reflect the concentration of large-scale manufacturers in China, the United States, India, and Morocco, with trade policy shifts (export quotas, tariffs, or bans) in these countries moving international spot pricing. Demand follows crop planting cycles and government fertilizer subsidy programs, which can shift unpredictably due to subsidy reform or import restrictions. Logistics, especially bulk vessel availability and changing inland freight rates, impact regional supply access.
China’s role as both top producer and frequent exporter gives it outsized influence on FOB price formation; recent years have shown stricter export controls to ensure domestic availability, tightening world supply. The US DAP market, while historically a net exporter, faces rising raw material input costs from energy and regulatory pressure. India operates a state-subsidized import system, making demand highly price-sensitive to global shifts and currency fluctuations. The EU and Japan maintain stable but mature markets, with regulatory scrutiny on heavy-metal content and environmental footprint requiring tighter compliance from suppliers.
Market volatility in DAP remains a function of raw material input fundamentals, regulatory stability, and the pace of modernization in emerging demand centers. Forecasts from sector analysis suggest DAP prices in 2026 will react to strategic shifts in Chinese and Indian import-export policy, continued volatility in natural gas pricing, and capital investments in new capacity in the Middle East. Environmental regulation on phosphate mining and fertilizer use is expected to tighten, raising compliance costs and putting upward pressure on high-purity and specialty grades. Data integration and forecasts draw from international price reporting services, fertilizer industry analysis, and published trade statistics.
Industry attention focuses on recent announcements of export controls over DAP by Chinese authorities and ongoing trade disputes between major producing regions. Weather-driven demand spikes and shipping disruptions (such as Suez or Panama Canal constraints) recently contributed to sharp swings in regional availability and spot prices.
Compliance monitoring remains strict around heavy metal maximums (cadmium, arsenic) in consuming regions, particularly for products entering the EU and Japan. Certification and batch testing requirements are escalating, especially for specialty application grades. Environmental impact assessments around phosphate mining and effluent management in primary producing regions drive ongoing cost and reformulation pressures.
Producers respond through sourcing diversification, investment in impurity reduction technologies, and tightening of batch pre-release protocols to address traceability and compliance. Enhanced dialogue with shippers and logistics service providers helps mitigate risk from transit disruptions. Advance inventory allocation and flexible campaign scheduling are used to absorb swings in customer delivery requirements under turbulence from seasonal or regulatory volatility.
Diammonium Phosphate (DAP) enters diverse industrial segments due to its dual-nutrient profile and available purities. Fertilizer production dominates DAP consumption, but meaningful volumes move into technical fields, including fire retardants, industrial water treatment, metal finishing, and specialty food processing. The intended application determines both the grade supplied and the required manufacturing controls.
| Application Field | Typical Grade | Key Parameters by Application |
|---|---|---|
| Agricultural Fertilizer | Standard/Granular Grade |
|
| Food Processing | Food Grade |
|
| Industrial Water Treatment | Technical Grade |
|
| Fire Retardants | Technical Grade |
|
| Metal Finishing / Surface Treatment | High-Purity Technical or Speciality Grade |
|
Industrial demand often relates to a primary production process or formulated product goal. DAP for direct fertilizer blending differs from DAP for food manufacturing or electroplating support, due to sensitivity to trace elements and need for batch documentation. Application context informs the level of supplier engagement and technical customization.
National and regional regulations set chemical and microbiological limits specific to use. Food additives require confirmation of compliance to FCC, GB, or EU standards, while fertilizer imports or commodity blending demand compliance with agricultural codes. Manufacturers must audit lot compliance during scale-up and batch release.
Granular fertilizer typically accepts broader impurity profiles than pharmaceutical or food processing streams. For high-purity or special processes, sodium, heavy metals, and organic impurities are minimized through adjusted purification strategies. Batch records track process variance, especially for end-use in regulated fields.
Large-scale agricultural users usually prioritize cost-per-nutrient and physical handling versus fine purity. Niche sectors, such as electronics or ultra-high-purity coatings, weigh higher prices against critical function. Available grades reflect a compromise between achieved purity and economic yield, negotiated in supply contracts.
Regardless of grade specification, user-side validation drives grade selection. Plant trials, process integrations, or bench-scale testing confirm compatibility. Customers often request pre-shipment samples to check for process yield, final product properties, and equipment behavior under actual plant conditions. Technical support follows any non-conformity, linking practical observations to in-plant analytical data and QA records.
Manufacturing Diammonium Phosphate (DAP) at scale involves formal quality management systems, typically following ISO 9001 standards. Certification audits focus on the effectiveness of controlled process documentation, consistency of batch production, and compliance with regulatory frameworks relevant to fertilizers and industrial inorganic chemicals. Production lines are routinely reviewed to ensure that raw materials meet internal acceptance criteria for purity and traceability before conversion.
Downstream users often require visible proof of manufacturer auditing. Site and process certifications reflect a track record of regular internal and external assessments. DAP produced under a comprehensive quality management system supports responsible sourcing requirements for international and domestic buyers, especially those needing origin documentation for supply chain transparency.
DAP meets differing domestic and overseas registration frameworks depending on the target market: compliance with REACH in the EU, China’s National Chemical Registry, or other fertilizer-specific regulatory lists as needed. Fertilizer grades intended for agricultural application may be required to satisfy product purity specifications, contaminants testing, and environmental safety compliance distinct from grades intended for industrial blending.
Food-application permits, heavy-metal screening, or product-environmental certifications usually require deeper periodic verification. Documentation for mining, industrial, or fertilizer DAP often references grade-specific production and analytical records, rather than a one-size-fits-all document set.
Every batch of DAP ships with a certificate of analysis (COA) reflecting both in-house and, where requested, third-party analytical verification. Typical reporting covers nutrient content (total P2O5, ammoniacal nitrogen, moisture) and flagged impurities (chlorides, fluorides, metals), with release values aligning to the intended use grade.
Clients requiring DAP for new product trials, downstream R&D, or registration often request technical dossiers, which can include detailed production descriptions, analytical methods, material safety, and product conformance reports. The traceability of report archives supports both immediate audit requests and long-term partnership reviews.
Industrial buyers value stable weekly or monthly supply. DAP production lines are configured for sustained multi-shift operation, with maintenance cycles calibrated to maximize output while minimizing unscheduled downtime. Strategic raw material inventory ensures minimal disruption even across seasonal phosphate and ammonia input swings. Yearly and quarterly supply protocols are frequently set up to help anchor both buyer production schedules and plant utilization rates.
Business agreements can adapt: spot purchasing, rolling contracts, or annual supply frameworks. Specific payment terms, shipment intervals, and storage provisions are negotiated directly based on project need, volume, and grade.
A manufacturer with dedicated reactor lines for DAP eliminates dependency on third-party blending or jobbing. Capacity is not only a reflection of reactor volume, but also of raw input contracts, logistics resilience, and internal warehousing. Multi-plant locations or backup production lines further insulate committed order volumes from unexpected operational snags.
Long-standing partnerships often include forward-production reservations and call-off flexibility, balancing manufacture’s line scheduling with buyer’s logistics planning. This approach secures continuity for both sides during raw material bottlenecks or logistic slowdowns.
Prospective buyers or formulation partners can request DAP samples for testing or certification purposes. Internal procedures require sample requests be assigned a reference batch number and, where necessary, include release documentation outlining grade, composition, and any special requirements. Each sample ships in sealed, labeled packaging to preserve integrity and support traceability through performance trials.
Feedback from sample analysis can trigger specification fine-tuning, additional quality screening, or process modification on subsequent production lots. Technical communication throughout the sample phase lays the groundwork for reliable scale-supply.
Cooperation modes reflect practical realities of supply chain management. Spot purchasing gives immediate fulfillment for short-term needs. Progressive annual contracts enable buyers to lock in pricing and volume, often with built-in flexibility for scheduled delivery or partial release. Consignment arrangements or vendor-managed inventory options provide direct line integration, reducing storage and handling risk for buyers.
Customization scope — packaging, palletization, labeling, workflow integration — adapts to customer-specific logistics. Document flow, advance release, and just-in-time delivery are all coordinated as per the buyer’s operational requirement, rather than imposing manufacturer-centric systems onto partners.
Recent R&D in diammonium phosphate (DAP) centers on process refinement for energy savings and resource efficiency. One focus addresses the conversion efficiency of ammonia and phosphoric acid feeds, seeking tighter reaction control during neutralization and granulation. Plants using different phosphoric acid strengths must constantly monitor the consistency of feed quality, as even minor variations in impurity profiles or contaminant levels—such as fluoride or heavy metals—affect both conversion rates and downstream product clarity. Laboratories run dissolution and caking studies since DAP’s handling and blending properties shift noticeably with grade, production method, and particle morphology.
Aside from mainstream fertilizer use, DAP research explores downstream roles in flame retardants, fire control agents, and specialty food processing where compounded purity and solubility are required. Technical grades target industrial fermentations and buffer applications, demanding lower impurity levels—especially for trace metals and chlorides. Recent studies examine DAP’s integration as a phosphorus donor in high-value, water-soluble formulations suitable for drip and foliar feeding, which calls for lower dusting, stable particle size distributions, and faster dissolution rates. Each of these applications drives factory adaptation—ranging from finer grinding to post-processing purification options like recrystallization or surface coating technologies.
Operational bottlenecks stem from variable raw material quality, seasonal swings in supply, and impurities leading to product instability or off-spec batches. Recent engineering advances optimize reactor residence time, recirculation rates, and pH stabilization to maintain batch uniformity and prevent premature crystallization. Continuous in-line monitoring of free acidity and ammonia content enables sharper cut-off criteria at the drying and sizing stages, reducing reprocessing and loss. Developing anti-caking and anti-dusting solutions extends DAP’s storage life and transport reliability for regions with high humidity. Each improvement reduces customer claims and unplanned downtime during bagging or silo loading.
DAP’s demand profile will remain sensitive to both global agricultural cycles and region-specific fertilizer policy shifts. Latest data project stable or moderately upward volume trends in staple crop regions, with premium on product traceability and environmental compliance. Competition from substitute fertilizers like monoammonium phosphate may increase in markets where yields depend on precise nutrient application, driving DAP producers to diversify grades and tighten quality assurance.
Manufacturers investing in process automation and real-time quality feedback see clear operational gains through reduced off-spec output and enhanced repeatability. Adoption of closed-loop control systems allows immediate tuning to compensate for fluctuating feedstock quality. Plants integrating waste heat recovery and advanced emissions control directly lower input costs and regulatory risks. Upgrading filtration and polishing steps improves the technical grade output, required for industrial and specialty food processing segments. Emphasis on reducing water and energy intensity shapes investments for new installations and retrofits.
Shifting regulatory and customer priorities accelerate R&D for cleaner production routes using lower-carbon ammonia sources and improved phosphoric acid purification. Plants transition to greener direct neutralization strategies, with ongoing trials for ammonia recovery and in-process phosphate recycling to cut effluent loads. Interest in life cycle and carbon footprint reduction incentivizes recovery of process by-products, such as gypsum from phosphate rock digestion, for construction or remediation uses. Technical collaboration with agricultural extension groups pushes for enhanced-release or slow-release DAP blends to minimize runoff and boost nutrient use efficiency at the farm level, adding another layer to product qualification and end-use optimization.
Field inquiries commonly address compatibility in bulk blending, physical stability under variable storage conditions, and dosing guidelines for custom fertilizer mixing. Support teams work directly with customer operators to diagnose and resolve issues related to product migration, agglomeration, or dust emissions during handling. Analytical labs offer batch traceability and third-party verification on request, covering not just assay values but impurity profiles by product grade and local requirements.
Crop-specific, region-adjusted guidance on DAP application rates and methods is provided in concert with agronomic field data. Inquiries about solubility in various water qualities, blending with micronutrients or stabilizers, and adjustment of granule size for pneumatic or mechanical application equipment arise frequently. For technical and industrial grades, advisory services focus on dissolution curves and impurity management to support process yields and reduce fouling or downstream contamination. Flexible support pathways ensure troubleshooting is responsive to plant-specific logistics and process flow set-ups.
Commitment includes ongoing remote and field technical support, real-time feedback on typical delivery characteristics, and responsiveness to claims or batch inconsistencies traced to transportation or storage transients. Guarantee protocols define product acceptance limits to customer specification and grade, not generic range claims. Consistency management tracks batch genealogy from raw material intake through dispatch, tied to the plant’s documented quality practices and internal release testing. Targeted follow-up is offered in response to customer-identified product or use concerns—with corrective action documented and fed back into process improvement programs.
Our facility operates continuous processes dedicated to the production of diammonium phosphate for large-scale industrial use. We convert raw ammonia and phosphoric acid into finished granular product, controlling each stage from reaction to granulation and screening. Strict environmental controls and automated monitoring keep batch-to-batch results dependable. This integration supports high output with efficient resource use, which matters for manufacturers seeking assured supply.
Diammonium phosphate enters the process lines of fertilizer manufacturers in bulk shipments for direct nutrient blending. The product’s role in agriculture stands out, feeding world crop production through controlled nitrogen and phosphorus delivery. In technical industries, our DAP supports corrosion inhibition for metal treatment solutions and acts as a key ingredient in flame retardant chemical formulations. Some food processors use food-grade DAP, subject to enhanced screening and documentation, as a yeast nutrient in production applications.
Our team manages every lot through laboratory oversight. We deploy in-line sensors and analytical equipment to track nutrient levels and moisture during production. Finished goods undergo regular sampling before release—producers depend on accurate, published analyses, and we monitor for tight particle size distribution and low contaminant content. This discipline ensures that blending, downstream reprocessing, and application outcomes remain stable for our clients.
Large buyers receive diammonium phosphate directly from our plant in packaging suited for mechanized loading. Granular shipments fill 50-kg bags, 1-ton flexible intermediate bulk containers, or move loose in bulk via pneumatic or covered vehicle. We load full container loads and schedule contract shipments into domestic and export markets, aligning output to customers’ operational cycles. Focus stays on minimizing handling to protect product integrity.
Process engineers, plant managers, and R&D staff come to us for insight on integrating diammonium phosphate into blend designs, process troubleshooting, and compliance queries. Our technical staff relies on direct production data and pilot-scale trials to answer formulation or flowability issues, contamination risks, and handling safety measures. We maintain technical documentation sets and support audits as required by industrial clients.
Fertilizer plants, distributors, and procurement operations benefit from direct purchase of producer-manufactured diammonium phosphate in several ways. Buyers gain scheduling flexibility and predictability, bypassing intermediaries and reducing risk in their supply chains. Transparency around volumes, quality analysis, and delivery plans simplifies inventory management and contract coordination. We see that procurement teams looking for total landed cost reductions realize long-term value by partnering with a factory stewarding both raw material inputs and finished product logistics.
Our ongoing investment in production capacity, analytical control, and delivery logistics reflects a direct manufacturer’s perspective. Industrial buyers searching for reliable, specification-driven diammonium phosphate receive sturdy technical support, process stability, and business value direct from our plant floor to theirs.
Diammonium Phosphate, better known in the fertilizer trade as DAP, serves growers as a concentrated source of both nitrogen and phosphorus. Our team manufactures DAP for use across a broad spectrum of crops, season after season. It is the backbone fertilizer for those seeking early-season nutrition and root establishment. This focus on crop vitality has taught us to pay close attention to the nutrient balance in every ton we dispatch from our sites.
In our production runs, our standard DAP formulation offers an NPK ratio of 18-46-0 by weight. To break this down: every 100 kilograms of DAP that exits our lines contains about 18 kilograms of total nitrogen (N) and 46 kilograms of available phosphate (expressed as P2O5). There is no intentional addition of potash (K2O) in DAP, which is reflected in the zero for potassium in the analysis. These values trace directly back to the raw materials and the process chemistry we use. We monitor them continuously to ensure each batch remains consistent and compliant with national and international regulations.
By formulating DAP at this ratio, we offer a ready-to-use product for cropping systems that demand both starter nitrogen and high quantities of phosphorus. Our clients often tell us that this profile reduces the number of separate fertilizer applications needed during planting. For regions with phosphorus-deficient soils, having 46% P2O5 on hand gives farmers confidence that seedlings will get the boost they require right from germination.
Every batch of DAP involves careful handling of ammonia and phosphoric acid, under controlled temperature and pressure conditions. This yields consistent 18-46-0 composition, with regular lab checks at each critical stage. We use particle size analysis and nutrient assays as part of our routine QC, and we retain retain samples for traceability. The focus is not just on hitting target nutrient numbers, but on delivering a physically stable product that spreads evenly with mechanical application equipment. Moisture control, bulk density, and granule hardness all matter in the field, and our technical team builds these parameters into the quality standard.
We don't take the nutrient ratio for granted. From conversations with global buyers and agronomists, we recognize that some end-users, particularly in regions with unique nutrient challenges, require supporting information on micronutrient compatibility or customization of blending. While our standard offering remains 18-46-0, our R&D division works with partners to adjust minor formulation details for specialized applications when scale permits.
Producing DAP at consistent 18-46-0 concentrations also fits wider goals for resource efficiency. Our facilities recover heat and recycle process water, reducing emissions and minimizing by-product streams. Traceable production and certification of inputs provide assurance that each bag reflects responsible manufacturing practices, verified by years of supplier audits and laboratory checks. This approach allows users to choose DAP with confidence, knowing the analysis they see on the bag matches the material delivered to the field.
From the manufacturing floor to export logistics, we take pride in supplying DAP that sticks to the 18-46-0 formula. This ratio represents a proven standard in crop nutrition, combining efficient phosphorus supply with enough nitrogen to support early plant vigor. Consistency, reliability, and a readiness to listen to customer requirements set the baseline for our approach as a direct manufacturer. For any technical details beyond the standard analysis, our technical team stands ready to provide detailed specifications and support.
Questions about minimum order quantity (MOQ) and lead time for bulk Diammonium Phosphate reach our team almost daily. As a direct manufacturer, we recognize customers need concrete information to plan procurement and keep operations running smoothly at scale.
Our MOQ for Diammonium Phosphate is based on several factors tied to production efficiency and cost control. Bulk orders begin at one full container load. That translates to 25 to 27 tons, shipped bagged or in bulk, depending on your logistical preference and handling setup.
Smaller orders drive up per-unit transport and manufacturing costs, impacting everyone’s bottom line. Standardizing MOQ at container level supports a consistent manufacturing pace and streamlines our packing and dispatch processes. Higher volume requests—multiple containers or full vessel lots—are always welcomed, and our logistics team can coordinate shipments staggered or consolidated as needed.
Lead time for Diammonium Phosphate bulk orders involves both our factory schedule and the broader supply chain. Our typical production cycle for a fresh order is 10 to 14 days, not counting national holidays or periodic maintenance. This estimate assumes raw materials already secured in inventory. In peak demand season, like spring planting or export rushes, we often advise partners to forecast ahead by several weeks; capacity fills quickly, and booking early guarantees both product and shipping space.
After production, we build in days for quality control checks, packaging, and loading, then hand off to the designated port or freight partner. International customers should add transit time from port of loading to final destination, shaped by route, port congestion, and any required documentation. Our commercial office provides updated schedules and shipping advice for routine and time-sensitive contracts.
Unlike trading houses, we control the production line. Ammonia and phosphoric acid, key raw materials for Diammonium Phosphate, are sourced through direct relationships with upstream chemical producers to shield against abrupt market swings. Nevertheless, global events can influence underlying costs or delivery speed. We stay transparent about any shifts in pricing or availability and alert customers if adjustments become necessary.
We see clear benefits in customer relationships rooted in long-term planning. Procurement teams who share annual or seasonal forecasts with us receive priority slotting in the production schedule and more predictable delivery terms. Our technical and sales teams are ready to advise on storage, application, or use requirements to maximize each shipment’s value to your facility.
Bulk chemical buyers gain confidence when they understand how MOQ and lead time intersect with real production constraints. We structure our manufacturing process and commercial policy to give clear commitments. For market uncertainty or special project requests, our approach stays anchored in what we can physically deliver—not speculative promises or third-party sourcing.
No vague timelines or fluctuating minimums—just a direct, factory-level commitment to quality, transparency, and on-time delivery in every bulk Diammonium Phosphate contract we supply.
Diammonium phosphate (DAP) continues to drive global crop yields, so it’s no surprise that our production lines move substantial quantities to customers in nearly every agricultural market. International shipments of DAP, much like the fertilizer itself, demand care in storage, handling, and transportation. The importance is not only about product integrity—it’s about safety, regulatory compliance, and operational efficiency. Decades in the chemical industry have shown us what works, where mistakes happen, and why short cuts end up costly.
Right from our packing area, our teams focus intensely on product dryness and cleanliness before loading any DAP. Moisture exposure during bagging or bulk transfer leads to clumping, caking, and, over time, unnecessary waste. On our factory floor, we use closed conveyor systems and sealed silos to control humidity. International transport requires these standards, since the long haul by sea means temperature swings and long container wait times at ports. Consistent quality begins with how we load and protect each shipment, not just with the specifications on the packaging label.
Regulatory differences between markets can turn a straightforward shipment into a logistical challenge. The UN classifies DAP as non-hazardous, but specific countries enforce their own rules regarding chemicals containing ammonium or phosphate. Some markets will require registration under local fertilizer control acts, others expect documentation proving the product is not cross-contaminated by urea or chlorine-based compounds.
We keep Material Safety Data Sheets, certificates of analysis, and transport papers up to date and accessible, because customs inspectors often request documentation for each consignment. Our compliance team routinely reviews transport regulations, including International Maritime Dangerous Goods (IMDG) practices, even for non-hazardous cargo. On land, some national road transport agencies set axle load limits or restrict the use of certain truck types for agricultural chemicals. Our logistics schedules build in time for inspection, knowing paperwork snags at a port or land border cost more than holding inventory in a clean, climate-controlled factory warehouse.
Bulk DAP and bagged DAP face distinctly different risks. FIBC big bags and laminated woven polypropylene sacks serve as our workhorses, with tight stitching and inner liners to keep moisture out. For every overseas shipment, we prioritize new or meticulously inspected containers. Salt-laden sea air seeps through tiny crevices and accelerates corrosion, even through container vents. This is not an abstract logistics theory—shipping through subtropical ports in monsoon season taught us the hard way that poorly stored DAP attracts water, leading to granule breakdown and lower agronomic value at the destination.
We also add “keep dry” labeling and provide cargo-specific stowage guidance for sea freight. Stack height, pallet wrapping, and bay placement within the container can decide whether the product arrives fresh or with density layering and water marks. These practices align with GACC, TFI, and FAO recommendations, and inspectors are checking that manufacturers observe them, not only shippers or freight companies.
Our workers undergo ongoing safety training because proper handling is essential. DAP dust can irritate the respiratory tract, so we require, and regularly audit, use of PPE such as dust masks, gloves, and eye protection during loading. This attention to worker safety doesn’t end at the plant—our technical team offers guidance and site visits to customers setting up bulk storage silos or automated bagging lines to ensure proper ventilation and minimal dust generation during unloading.
International buyers ask what sets direct manufacturers apart in logistics. It’s not just the product purity, it’s the depth of experience organizing hundreds of safe, compliant shipments. We believe the real measure of a job well done is what arrives at the farm, not just what leaves our gate. Industry-wide, the push for higher quality crops, safety, and traceability means every aspect of handling and transport counts, and those standards are never optional here.
For product inquiries, sample requests, quotations or after-sales support, please feel free to contact me directly via sales3@ascent-chem.com, +8615365186327 or WhatsApp: +8615365186327
