Product Description

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.

The IUPAC name of Sodium phosphite is sodium phosphonate pentahydrate. With the CAS registry number 13708-85-5, it is also named as Phosphonic acid, disodium salt. The product's category is Inorganics, and the other registry numbers are 130184-07-5; 16926-95-7; 448193-21-3. Besides, it is colorless monoclinic or orthorhombic crystals, which is toxic along with all phosphites. In addition, its molecular formula is HNa2O3P and molecular weight is 125.96.