
Sodium metabisulfite appears as a white crystalline or powder solid with a slight sulfur odor. Toxic by inhalation. Strongly irritates skin and tissue. Noncombustible, but may decompose to emit toxic oxide fumes of sulfur and sodium when heated to high temperature. A corrosive acid when mixed with water. Used as a food preservative and as a laboratory reagent,the spice industry is used to produce vanillin, used as a preservative in the brewing industry.
Name: Sodium Metabisulfite,Sodium Metabisulphite
Appearance: white or light yellow powder or crystalline powder
Type:Emulsifiers,Enzyme Preparations,Flavoring
Grade:Food Grade/Feed Grade/Industry Grade
Molecular Formula:Na2S2o5
CAS NO.:7681-57-4
EINECS:231-673-0
Hs Code:28311020
Certificate:SGS/Health Certificate/ISO/Kosher
Items | Standard | Test Result |
Content(Na2s2o5) ≥ | 97.0% | 97.5% |
SO2: ≥ | 65.0% | 66.2% |
Iron(Fe) :≤ | 0.002% | 0.0015% |
Ar senic (As) ≤ | 0.0001% | <0.0001 |
Water Insoluble Matter: ≤ | 0.02% | 0.01% |
PB: ≤ | 0.0005% | 0.00048% |
PH | 4-4.8 | 4.58 |
(1) Food Grade: Bleach agent (e.g. candies, cake, bamboo shoots, etc); Loose agent (e.g. bread, cracker etc); Antiseptic and germicide (e.g. fruit juice, tinned food, brews, the cereals food is defended storage etc); Inhibitor and freshen agent (e.g. day lily, seafood, fruit and vegetable etc).
(2) Industry Grade: Mordant of printing and dyeing; Dechlorinate of textile after bleaching; Sulphonated agent and reducer of chemical industry and pharmacy; Bleach of paper pulp, bamboo and timber bleach of Stap; Treatment agent of waste water; Rubber solidifying agent Perfume industry is served as hydro carbon perfume aldehyde
The hide profession employ to do to molt dose and pliable dose and wearproof dose; sewage treatment, and so on .
(3) Pharmaceutical Grade: In chemical synthesis in the production of acrylic fibre, vitamin K, vitamin A, pharmaceutical intermediates, etc.
(4) Photo Grade: The sensitize industry is served as the developing agent reductant and the protection of fixing bath dose.


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