SODIUM METABISULFITE
Prepared at the 53rd JECFA (1999) and published in FNP 52 Add 7 (1999), superseding tentative specifications prepared at the 51st JECFA (1998),
published in FNP 52 Add 6 (1998). Group ADI 0-0.7 mg/kg bw as SO2 for sulfite established at the 51st JECFA in 1998.
SYNONYMS INS No. 223
DEFINITION
Chemical names Sodium disulfite, disodium pentaoxodisulfate, disodium pyrosulfite
C.A.S. number 7681-57-4
Chemical formula Na2S2O5
Formula weight 190.11
Assay Not less than 90.0%
DESCRIPTION White crystals or crystalline powder having an odour of sulfur dioxide
FUNCTIONAL USES Antibrowning agent, antioxidant, flour treatment agent, preservative
