Sodium Metabisulfite or sodium pyrosulfite (IUPAC spelling; Br. E. sodium metabisulphite or sodium pyrosulphite) is an inorganic compound of chemical formula Na2S2O5. The substance is sometimes referred to as disodium metabisulfite. It is used as a disinfectant, antioxidant and preservative agent.
Appearance:White crystalline powder
Molecular formula: Na2S2O5
Molecular weight: 190.09
CAS No.: 7681-57-4
HS No.: 28321000.00
FEMA No.: 3025
Function :preservative,Bleaching agent,Antiseptic,Inhibitor.
White free-flowing Crystal Powder
Heavy Metal (Pb)
5 ppm max
1 ppm max
It is used widely as an acidifier, as a flavoring and chelating agent.
25kgs/PP PE BAG
Storage and Transportation
kept in a light-proof,well-colsed,dry and cool place.