English Name: Sodium metabisulfite

English aliases are: Sodium pyrosulfite; disodium disulphite; Sodium metabisulphite; Sodium disulphite; Sodium pyrosulphite; SODIUM pyrosulphite; "Wei"; "Wei"; "Wei"; "Yu".

CAS: 7681-57-4

EINECS: 231-673-0

Molecular formula: Na2S2O5

Molecular weight: 190.1065

InChI: InChI=1/2Na.H2O5S2/c;; 1-6 (2) 7 (3,4) 5/h; (H, 1,2) (H, 3,4,5) /q2*+1; /p-2

Molecular structure:

Melting point: 150 degrees centigrade

Water solubility: 540 g/L (20 C)

Physical and chemical properties:

White or yellowish crystalline powder.

Relative density 1.4

Solubility is dissolved in water, and water solution is acidic. Soluble in glycerol and slightly soluble in ethanol.

Product use:

Used as a bleaching agent, mordant, reducing agent, rubber coagulator, also used in organic synthesis, pharmaceutical and perfume etc.