Phosphite anion

Phosphite anion

Names
IUPAC name Phosphonate
Systematic IUPAC name Phosphite[1]
Identifiers
CAS Number	15477-76-6 N
3D model (JSmol)	hypervalent form: Interactive image ionic form: Interactive image
ChEBI	CHEBI:16215 N
ChemSpider	10449627 N
Gmelin Reference	1618
MeSH	Phosphorite
PubChem CID	406
CompTox Dashboard (EPA)	DTXSID80164154
InChI InChI=1S/O3P/c1-4(2)3/q-3 N Key: AQSJGOWTSHOLKH-UHFFFAOYSA-N N
SMILES hypervalent form: P([O-])([O-])=O ionic form: [H][P+]([O-])([O-])[O-]
Properties
Chemical formula	HPO2− 3
Molar mass	79.9810 g mol−1
Related compounds
Other anions	Phosphinite Phosphonite
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

A phosphite anion or phosphite in inorganic chemistry usually refers to [HPO₃]²⁻ but includes [H₂PO₃]⁻ ([HPO₂(OH)]⁻). These anions are the conjugate bases of phosphorous acid (H₃PO₃). The corresponding salts, e.g. sodium phosphite (Na₂HPO₃) are reducing in character.