Ammonium phosphinate

Ammonium phosphinate is a chemical compound with the chemical formula NH₄PH₂O₂.^[3][4] This is a salt of ammonium and phosphinic acid.

Ammonium phosphinate

Names
Other names Ammonium hypophosphite
Identifiers
CAS Number	7803-65-8
3D model (JSmol)	Interactive image
ChemSpider	29342364
ECHA InfoCard	100.029.333
EC Number	232-266-0
CompTox Dashboard (EPA)	DTXSID20884440
InChI InChI=1S/H3N.H3O2P/c;1-3-2/h1H3;3H2,(H,1,2) Key: AQQVTZBWWYVEGR-UHFFFAOYSA-N
SMILES [PH2](=O)O.N
Properties
Chemical formula	H6NO2P
Molar mass	83.027 g·mol−1
Appearance	colorless crystals
Density	1.634 g/cm3
Melting point	200
Solubility in water	soluble
Hazards
GHS labelling:
Pictograms	[1]
Signal word	Warning
Hazard statements	H315, H319, H335[2]
Precautionary statements	P261, P305, P338, P351[2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Synthesis

Synthesis of ammonium phosphinate may be achieved by the effect of ammonia solution on phosphinic acid solution:

HPH₂O₂ + NH₃ → NH₄PH₂O₂

Physical properties

Ammonium phosphonate forms colorless crystals of the orthorhombic system, space group Cmma, cell parameters a = 0.757 nm, b = 1.147 nm, c = 0.398 nm, Z = 4.^[5]

The compound is soluble in water and ethanol, but insoluble in acetone.^[6]

Uses

The compound is usually used as a catalyst for the production of polyamide.^[2]