Ammonium phosphate

Ammonium phosphate[1]
IUPAC name
ammonium phosphate
other names
triammonium phosphate
Identifiers
CAS number 10361-65-6 Yes check.svgY
SMILES
Properties
Molecular formula H12N3O4P
Molar mass 149.09 g mol−1
Solubility in water 25.0 g/100 g
Thermochemistry
Std enthalpy of
formation ΔfHo298		 -1671.9 kJ/mol
Related compounds
Other anions Diammonium hydrogen phosphate
Ammonium dihydrogen phosphate
Other cations Sodium phosphate
Potassium phosphate
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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 molecular 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, or on the addition of excess of ammonia to the acid phosphate (NH4)2HPO4. It is soluble in water, and the aqueous solution on boiling loses ammonia and the acid phosphate NH4H2PO4 is formed.

Ammonium phosphate is used as an ingredient in some fertilizers as a high source of elemental nitrogen. It is also used as a flame retardant in thermoplastic compositions.[2]

References

  1. ^ Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, FL: CRC Press. pp. 4–42, 5-19. ISBN 0849305942 [Amazon-US | Amazon-UK]. 
  2. ^ http://www.freshpatents.com/Flame-retardant-composition-dt20051229ptan20050288402.php


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