Sodium Metabisulfite (CAS No. 7681-57-4)

Sodium Metabisulfite

Synonyms

Sodium pyrosulfite; Disodium disulphite;

Disulfurous acid disodium salt; Pyrosulfurous acid disodium salt

Sodium Metabisulfite food grade

CAS No.: 7681-57-4

Molecular Weight: 190.10

Molecular Formula: Na2S2O5

Applications

• industrial bleaching and reducing agent.
• remove excess chlorine from drinking water.
• photographic developing and fixing bath agent.

Specification

Appearance: White or light yellow crystalline powder

Purity (as Na2S2O5): ≥96.5%

Heavy Metals (as Pb): ≤0.005%

Iron (as Fe): ≤0.003%

Arsenic: ≤0.001%

Water insoluble: ≤0.05%

Storage

In cool and dry place without sunlight.