Disodium hydrogen phosphate

◣ Basic Information

Chemical formula: Na₂HPO₄

English Name: Disodium Hydrogen Phosphate

Molecular weight: 141.96 (Calculated from the common dodecahydrate \(Na_2HPO_4-12H_2O\), molecular weight is 358.14)

◣ _Properties

Physical Properties: Disodium phosphate is usually white crystalline powder or colorless transparent crystal. It is easily soluble in water and its aqueous solution is alkaline. Dodecahydrate is easily weathered in air, and will lose water of crystallization when heated to a certain temperature.

Chemical Properties: It has the general property of salt, and can react with acid, alkali, salt and other substances. For example, it reacts with strong acid to generate phosphoric acid, and reacts with certain metal ions to generate the corresponding phosphate precipitate. In aqueous solution, disodium phosphate will be hydrolyzed, making the solution alkaline.

◣ Uses

Industrial use: water treatment, detergent, paper industry

Food industry: quality improver, nutritional enhancer
Pharmaceutical field: pharmaceutical excipients, phosphorus supplements

Other fields: agricultural field, chemical analysis