Monoammonium phosphate

Ammonium dihydrogen phosphate1
Identifiers
CAS number 7722-76-1 Yes check.svgY
SMILES
Properties
Molecular formula H6NO4P
Molar mass 115.03 g mol−1
Appearance white tetragonal crystals
Density 1.80 g/cm3
Melting point

190 °C, 463 K, 374 °F

Solubility in water 40.4 g/100 mL
Thermochemistry
Std enthalpy of
formation ΔfHo298
-1671.9 kJ/mol
Related compounds
Other anions Ammonium phosphate
Diammonium hydrogen phosphate
Other cations Monosodium phosphate
Potassium dihydrogen phosphate
 Yes check.svgY (what is this?)  (verify)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Ammonium dihydrogen phosphate, or monoammonium phosphate, NH4H2PO4, is formed when a solution of phosphoric acid is added to ammonia until the solution is distinctly acidic. It crystallizes in quadratic prisms. Monoammonium phosphate is often used in the blending of dry agricultural fertilizers. It supplies soil with the elements nitrogen and phosphorus in a form which is usable by plants. The compound is also a component of the ABC powder in some dry chemical fire extinguishers. This substance is also supplied in a jade green or aquamarine crystal growing box kit for kids.

References

  1. ^ Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, FL: CRC Press. pp. 4–40. ISBN 0849305942. 

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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article http://en.wikipedia.org/wiki/Monoammonium_phosphate. Additionally, in some cases elements from this article might be licensed under a different license. Please refer to the original article to check the license status http://en.wikipedia.org/wiki/Monoammonium_phosphate.