528. Ammonium Hypophosphite

Nomenclature

CAS number: 7803-65-8
Phosphinic acid ammonium salt (1:1).
H6NO2P; mol wt 83.03.
H 7.28%, N 16.87%, O 38.54%, P 37.30%.
NH4H2PO2.

Description and references

Prepn: Gmelins, Ammonium (8th ed.) 23, 416 (1936).

Properties

Hygroscopic and deliquesc crystals or white granules. Decomposes when heated with evolution of phosphine which ignites spontaneously. One gram dissolves in about 1 ml water, 0.2 ml boiling water, 20 ml alcohol; freely sol in boiling alcohol, practically insol in acetone. The aq soln is practically neutral. Keep well closed.

Use

As catalyst in polyamide manuf.