Diammonium Phosphate DAP Fertilizer 18-46-0 NPK Agricultural Grade

Product Specification

Diammonium Phosphate (DAP) is a highly efficient nitrogen-phosphorus compound fertilizer and a significant industrial raw material, renowned for its high nutrient content, excellent physical properties, and wide applicability. It plays a crucial role in modern agriculture, industrial processes, and specialty applications. Production typically involves the reaction of phosphoric acid with ammonia under controlled conditions, followed by granulation and drying.

❋ Aliases: DAP
❋ English Name: Diammonium Phosphate
❋ Chemical Formula: (NH₄)₂HPO₄
❋ Molecular Weight: 132.06
❋ CAS Number: 7783-28-0

Key Properties: High nutrient concentration (N & P), good granular stability, low hygroscopicity, slight alkalinity.

Advanced Application Scenarios

1. "High-Efficiency Starter Fertilizer" in Precision Agriculture

• As a base fertilizer for cereals, oilseeds, and cash crops, it provides readily available nitrogen and phosphorus, promoting robust early growth and root development.

• Its alkaline nature helps neutralize soil acidity, making it particularly beneficial for acidic soils, improving phosphorus availability and soil health.

2. "Fire Suppression Agent" in Safety Systems

• A key component in ABC dry chemical fire extinguishers, effectively suppressing Class A (combustibles), B (flammables), and C (electrical) fires by interrupting the chemical chain reaction.

• Used as a flame retardant impregnation for wood and textiles, reducing flammability through intumescent and char-forming mechanisms.

3. "Nutrient and Buffer" in Bioprocessing

• Serves as a dual nitrogen and phosphorus source in industrial fermentation for producing antibiotics, organic acids, and enzymes, supporting high-density microbial growth.

• Acts as a pH buffer in microbial culture media and diagnostic reagent kits, maintaining optimal conditions for biochemical reactions.

4. "Industrial Additive" in Manufacturing

• Functions as a flux in metal soldering and welding, removing oxides and ensuring clean, strong joints.

• Used as a dispersant and stabilizer in ceramic glazes and pigment production, enhancing uniformity and performance.

Technological Breakthroughs and Sustainable Development

Advanced Granulation and Quality Control

• Utilization of pipe-reactor and spherodizer granulation technologies produces hard, uniform, dust-free granules with excellent flowability and precise nutrient content, minimizing segregation and dust loss during handling and application.

• Implementation of real-time NIR (Near-Infrared) analyzers for continuous monitoring of nutrient levels (N and P₂O₅) and moisture content, ensuring consistent product quality and compliance with specifications.

Enhanced Nutrient Efficiency and Environmental Stewardship

• Development of polymer-coated or inhibitor-amended (e.g., urease/nitrification inhibitors) DAP formulations to slow nutrient release, reducing ammonia volatilization and nitrate leaching, thereby improving nutrient use efficiency (NUE) and minimizing environmental impact.

• Installation of advanced air scrubbing systems (e.g., wet scrubbers) in production facilities to capture ammonia and particulate emissions, significantly reducing the environmental footprint.

Process Optimization and Resource Efficiency

• Adoption of energy-efficient process designs, including pre-neutralizers and pipe reactors, coupled with heat recovery systems from granulation and drying units, reduces specific energy consumption and greenhouse gas emissions per ton of product.

• Sourcing of purified wet-process phosphoric acid or implementing purification steps to lower the content of undesirable elements like cadmium and other heavy metals, contributing to product safety and sustainability.

Quality Assurance and Regulatory Compliance

• Strict adherence to international quality standards (e.g., ISO, ASTM) for nutrient content, granule hardness, and size distribution.

• Regular monitoring and control of impurity levels (e.g., heavy metals, fluorine) to meet increasingly stringent global regulatory requirements for fertilizers and industrial chemicals.

Technical Advantages

Quality Specifications

• Nitrogen (N) Content: ≥ 18.0%

• Phosphorus (P₂O₅) Content: ≥ 46.0%

• Water-Soluble P₂O₅: Typically > 90% of total P₂O₅

Physical Characteristics

• Appearance: Typically light brown to grey, spherical granules.

• Solubility: Freely soluble in water. The resulting solution is slightly alkaline (pH ~8.0).

Application Support

• Provides customized agronomic advice for different cropping systems, soil types, and application methods to optimize crop yield and fertilizer efficiency.

• Delivers technical support for industrial applications, including formulation guidance for fire retardants and performance data for use in various industrial processes.

Why Choose Us?

✅ High-purity products, in compliance with international standards
✅ 30+ Years Chemical Manufacturing Experience
✅ Strict QC with Batch Traceability
✅ Global logistics, supporting sea and air transportation
✅ Technical support, providing customized solutions
✅ Factory direct supply, with strong price competitiveness