Phosphinous acid

Phosphinous acid
Names
	Other names hydroxyphosphine
Identifiers
CAS Number	13840-40-9;
3D model (JSmol)	Interactive image;
ChemSpider	126521;
PubChem CID	143409;
CompTox Dashboard (EPA)	DTXSID80276387 ;
	InChI InChI=1S/H3OP/c1-2/h1H,2H2 Key: RYIOLWQRQXDECZ-UHFFFAOYSA-N;
	SMILES OP;
Properties
Chemical formula	H3OP
Molar mass	49.997 g·mol−1
Related compounds
Related compounds	Hydroxylamine
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Phosphinous acid is the inorganic compound with the formula H₂POH. It exists, fleetingly, as a mixture with its less stable tautomer H₃PO (phosphine oxide). This mixture has been generated by low temperature oxidation of phosphine with ozone. H₂POH is mainly of pedagogical interest. Organophosphinous acids are more prevalent than the parent H₂POH.