Sodium Sulfite

CAS#: 7757-83-7

Synonyms: Sulfurous acid, sodium salt (1:2); sulfurous acid, disodium salt; disodium sulfite; sodium sulphite; exsiccated sodium sulfite

Uses: Paper industry (semichemical pulp), reducing agent (dyes), water treatment, photographic developer, food preservative and antioxidant, textile bleaching.

Hazard: When ingested, solutions cause gastric irritation by the liberation of sulfurous acid.  Because of rapid oxidation to sulfate, sulfites are well tolerated until large doses are reached; then violent colic and diarrhea, circulatory disturbances, central nervous depression, and death can occur.  Use prohibited in meats and other sources of  Vitamin B.  Strong Reducing Agent