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Introduction of Ammonium Dihydrogen Phosphate



  Ammonium dihydrogen phosphate, also known as monoammonium phosphate, is a white crystal. Its chemical formula is NH4H2PO4. It can be decomposed into ammonium metaphosphate (NH4PO3) by heating. It can be prepared by reaction of ammonia water and phosphoric acid. It is mainly used as a fire retardant for fertilizers and wood, paper and fabrics, and also as a pharmaceutical and ruminant feed additive.

Basic introduction


Product number: ALG-B10137

Ammonium dihydrogen phosphate, Ammonium biphosphate, Primary ammonium phosphate, Ammonium acid phosphate, mono-Ammonium phosphate

Molecular formula of ammonium dihydrogen phosphate

[Relative molecular weight or atomic weight] 115.03




SMILES: [O-]P(= O) (O)O. [NH4+]

[density] 1.803

[Melting Point () 180

[refractive index] 1.479; 1.525


White crystalline powder. Stable in air. It is slightly soluble in ethanol and insoluble in acetone. The aqueous solution is acidic. The solubility in water is 37.4g at room temperature (20 C). The relative density is 1.80. The melting point is 180 degrees.  Refractive index is 1.525.

Index Value of Quality Inspection Information Quality Inspection Item

Arsenic (As),%<0.0005

PH (50g/L solution, 25 C) 4.0-4.5

Water insoluble,%<0.003

Heavy metals (in terms of lead),%<0.0005 sodium (Na),%<0.003

Potassium (K),% less than 0.003

Iron (Fe),%<0.0005

Chloride (Cl),%<0.00025

Sulfur compounds (in terms of SO4),%<0.0025

Nitrate (NO3),%<0.001

Clarification test qualified

Content (NH4H2PO4)%>99.5