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Sodium Metabisulfite
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.
Introduction
Appearance:White crystalline powder
Molecular formula: Na2S2O5
Molecular weight: 190.09
CAS No.: 7681-57-4 ?????????????
HS No.: 28321000.00
FEMA No.: 3025
EINECS No.:231-673-0
Function :preservative,Bleaching agent,Antiseptic,Inhibitor.
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Technical Specification
Tests |
Specification |
Appearance |
White?free-flowing?Crystal?Powder |
Purity?(Na2S2O5) |
97%?min |
Iron?(Fe) |
0.003%?min |
Heavy?Metal?(Pb) |
5?ppm?max |
Arsenic?(As) |
1?ppm?max |
Water?Insoluble |
0.05%?max |
PH?Value |
4.0-4.6 |
Application
It is used widely as an acidifier, as a flavoring and chelating agent.
Packing
25kgs/PP PE BAG
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Storage and Transportation
kept in a light-proof,well-colsed,dry and cool place.
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