Disodium hydrogen phosphite

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 HPO₃. 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.

单词	Sodium phosphite
释义	Sodium phosphite 英语百科 Disodium hydrogen phosphite 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 HPO₃. 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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Sodium phosphite

Disodium hydrogen phosphite