ammonium phosphate

Ammonium phosphate[1]
IUPAC name ammonium phosphate
Other names triammonium phosphate
Identifiers
CAS number	10361-65-6 Y
ChemSpider	140090 Y
Jmol-3D images	Image 1
SMILES [O-]P([O-])([O-])=O.[NH4+].[NH4+].[NH4+]
InChI InChI=1S/3H3N.H3O4P/c;;;1-5(2,3)4/h3*1H3;(H3,1,2,3,4) Y Key: ZRIUUUJAJJNDSS-UHFFFAOYSA-N Y InChI=1/3H3N.H3O4P/c;;;1-5(2,3)4/h3*1H3;(H3,1,2,3,4) Key: ZRIUUUJAJJNDSS-UHFFFAOYAA
Properties
Molecular formula	H12N3O4P
Molar mass	149.09 g mol−1
Solubility in water	58.0 g/100 mL (25 °C)
Thermochemistry
Std enthalpy of formation ΔfHo298	-1671.9 kJ/mol
Related compounds
Other anions	Diammonium phosphate Ammonium dihydrogen phosphate
Other cations	Sodium phosphate Potassium phosphate
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Ammonium phosphate is the salt of ammonia and phosphoric acid. It has the formula (NH₄)₃PO₄ and consists of ammonium cations and phosphate anion. It is obtained as a crystalline powder upon mixing concentrated solutions of ammonia and phosphoric acid. It is soluble in water, and the aqueous solution on boiling loses ammonia. There are related acid salts, diammonium phosphate (DAP, (NH₄)₂HPO₄) and monoammonium phosphate (MAP, NH₄H₂PO₄). These can be interconverted by adding more ammonia or phosphoric acid as needed.

Ammonium phosphate is used as an ingredient in some fertilizers as a source of nitrogen. It is also used as a flame retardant in thermoplastic compositions. It is also used in bread making to promote the growth of the yeast.^[2]

See also

• Ammonium polyphosphate
• Monoammonium phosphate
• Diammonium phosphate

References

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