Disodium hydrogen phosphite

Disodium hydrogen phosphite
Skeletal formula of disodium hydrogen phosphite
Ball-and-stick model of the component ions of disodium hydrogen phosphite
Names
IUPAC name
sodium phosphonate pentahydrate
Other names
Sodium phosphite dibasic pentahydrate,
sodium phosphite
Identifiers
13708-85-5 YesY
13517-23-2 (pentahydrate) N
ChemSpider 21106436 YesY
Jmol interactive 3D Image
Image
Properties
HNa2O3P
Molar mass 125.96 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YesYN ?)
Infobox references

Disodium hydrogen phosphite is the chemical compound Na2HPO3 which is commonly encountered as the pentahydrate. It is a salt of phosphorous acid, HP(O)(OH)2 and contains the anion HPO32−. Its common name suggests that it contains an acidic hydrogen atom, as in sodium hydrogen carbonate. However, this is misleading as the hydrogen atom is bonded to phosphorus rather than oxygen. It is toxic along with all phosphites. Phosphites contain phosphorus in its +3 oxidation state and are therefore reducing agents.


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