Diammonium phosphate (DAP), with the chemical formula (NH4)2HPO4, is a widely used inorganic compound that serves as both a source of nitrogen and phosphorus in various applications. It is a white crystalline salt with high solubility in water.

Preparation and Properties of Diammonium Phosphate: Diammonium phosphate is commonly prepared by the reaction of ammonia (NH3) with phosphoric acid (H3PO4):

2 NH3 + H3PO4 → (NH4)2HPO4

The resulting product, diammonium phosphate, forms as colorless crystals that are easily soluble in water. Its solubility in water makes it a convenient and effective fertilizer and nutrient source for plants.

Uses of Diammonium Phosphate:

1. Fertilizer: DAP is a widely used fertilizer in agriculture due to its high content of both nitrogen and phosphorus, essential nutrients for plant growth. It is commonly used as a starter fertilizer for crops and is suitable for various soil types and crops.
2. Flame Retardant: Diammonium phosphate is used in the production of fire extinguishing agents and flame retardants. When combined with ammonium polyphosphate, it forms a flame-retardant agent used in various materials to reduce their flammability.
3. Food Additive: DAP is used as a food additive in some food products to act as a leavening agent, helping baked goods rise during baking.

Safety Considerations: Diammonium phosphate is generally considered safe when used as directed. However, like any chemical fertilizer or additive, it should be handled with care and in accordance with safety guidelines. When handling DAP as a fertilizer or in its raw form, it is essential to use proper protective equipment, avoid inhalation, and prevent contact with eyes and skin.

When using DAP in food applications, it is subject to food safety regulations and guidelines to ensure its safe use as an additive.

Please note that the information provided here is for general knowledge, and specific safety recommendations may vary based on the application and local regulations. Always follow the manufacturer’s instructions and safety guidelines when using diammonium phosphate or any other chemical compound. If you have specific questions or concerns about the safe use of DAP, it is best to consult with experts in the relevant fields or local agricultural and food safety authorities.