Disodium hydrogen phosphite
Appearance
Names | |
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IUPAC name
sodium phosphonate pentahydrate
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Other names
Sodium phosphite dibasic pentahydrate,
sodium phosphite | |
Identifiers | |
3D model (JSmol)
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ChemSpider | |
ECHA InfoCard | 100.033.848 |
CompTox Dashboard (EPA)
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Properties | |
HNa2O3P | |
Molar mass | 125.958 g·mol−1 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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[citation needed] along with all phosphites. Phosphites contain phosphorus in its +3 oxidation state and are therefore reducing agents.