Diammonium Phosphate CAS 7783-28-0 High-Purity Diammonium Phosphate (DAP) – (NH₄)₂HPO₄ – Fertilizer Grade & Industrial Grade

Diammonium Phosphate(DAP), commonly known as DAP, is a highly soluble inorganic compound with the chemical formula (NH₄)₂HPO₄ and molecular weight 132.06 g/mol. With CAS number 7783-28-0, it is one of the most widely used phosphorus-nitrogen fertilizers and industrial chemicals in the world.

Key Properties-Diammonium Phosphate(DAP)

  • Appearance: White crystalline powder or granules
  • Nitrogen (N) content: ≥18.0%
  • Phosphorus pentoxide (P₂O₅) content: ≥46.0%
  • pH (1% solution): 7.8 – 8.5
  • Solubility: Highly soluble in water (57.5 g/100mL at 20°C)
  • Moisture: ≤0.2%
  • Insoluble matter: ≤0.1%

Primary Applications and Benefits-Diammonium Phosphate(DAP)

Agriculture & Fertilizer Diammonium phosphate is a premium high-analysis fertilizer that provides both nitrogen and phosphorus in readily available forms. It is ideal for:

  • Basal application in crops such as wheat, rice, maize, soybeans, cotton, and vegetables
  • Promoting strong root development and early plant growth
  • Use in compound fertilizer blending and bulk blending (BB) fertilizers

Industrial Uses

  • Fire retardant in wood, paper, and textile industries
  • Yeast nutrient and buffer in winemaking and brewing
  • Additive in animal feed
  • Raw material for specialty chemicals and water treatment
  • pH regulator and buffering agent in various industrial processes

Water Treatment Used as a corrosion inhibitor and nutrient source in municipal and industrial water systems.

Why Choose Our Diammonium Phosphate?

  • Consistent high nutrient content (18-46-0)
  • Low moisture and excellent flowability for easy handling and storage
  • Low heavy metal and impurity levels
  • Available in powder and granular forms
  • Strict quality control with COA for every batch
  • Reliable supply for both fertilizer manufacturers and industrial users

Whether you need DAP for large-scale agricultural use, fertilizer production, or industrial applications, our diammonium phosphate delivers superior performance and value.

Frequently Asked Questions (FAQs)-Diammonium Phosphate(DAP)

What is Diammonium Phosphate used for?

It is primarily used as a high-efficiency nitrogen-phosphorus fertilizer in agriculture and as an industrial chemical in fire retardants, brewing, animal feed, and water treatment.

What is the N-P content of Diammonium Phosphate?

Standard fertilizer-grade DAP contains approximately 18% Nitrogen (N) and 46% Phosphorus pentoxide (P₂O₅), commonly labeled as 18-46-0.

Is Diammonium Phosphate water soluble?

Yes, it is highly water-soluble, making it suitable for both soil application and fertigation systems.

What is the difference between DAP and MAP?

DAP (Diammonium Phosphate) is alkaline (pH 7.8–8.5), while MAP (Monoammonium Phosphate) is acidic. DAP is preferred when soil needs both high phosphorus and a less acidic reaction.

Is it safe to handle?

Diammonium phosphate is generally considered safe when handled properly. It may cause mild irritation to eyes and skin. Use standard PPE (gloves, goggles) during handling. Avoid inhalation of dust.

How should Diammonium Phosphate be stored?

Store in a cool, dry, well-ventilated warehouse away from moisture and incompatible materials such as strong bases or oxidizers. Keep bags tightly sealed to prevent caking.

Can Diammonium Phosphate(DAP) be used in organic farming?

No, standard DAP is a synthetic fertilizer and is not allowed in certified organic agriculture.

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