by Product Pictures:
Product Descriptions：
Sodium metabisulfite(SMBS) is a white or yellow crystalline powder or small crystal with a strong SO2 odor, a specific gravity of 1.4,soluble in water, and the aqueous solution is acidic. When it is in contact with a strong acid, it releases SO2 to form a corresponding salt. When it is left in the air, it oxidizes. It is Na2S2O5, so the product cannot be stored for a long time. Above150 degrees Celsius, SO2 is decomposed.
| Appearance | White or yellowish crystalline powder |
| CAS No. | 7681-57-4 |
| EINECS | 231-673-0 |
| H.S.CODE | 2832100000 |
| Molecular Formula | Na2S2O5 |
| Item | Industrial Grade | Food Grade | High Purity Grade | Dyeing Grade |
| Main content(Na2S2O5),% | ≥96.5 | ≥97 | ≥98 | ≥96.5 |
| Iron(as content Fe),% | ≤0.005 | ≤0.003 | ≤0.001 | ≤0.005 |
| Clarity | Clear | Clear | Clear | Clear |
| Water-Insoluble | ≤0.05 | ≤0.0005 | ≤0.01 | ≤0.05 |
| Heavy metal content (Pb),% | — | ≤0.0005 | ≤0.0005 | — |
| Arsenic content (As),% | ≤0.0001 | ≤0.0001 | ≤0.0001 | ≤0.0001 |
| NaCl content,% | — | — | — | — |
| PH | 4.2-4.8 | |||
Application:
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Sodium metabisulphite Food Grade:
* Bleach (such as candy, cakes, etc.)
* Loosening agents (such as bread, biscuits, etc. )
* Antiseptic fungicides (such as juice, canned, etc.)
* Anti-oxidants (such as seafood, fruits and vegetables)
* Color protecting agents and preservatives.
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Sodium Metabisulphite Industrial Grade:
* Chemical and doctor reductants and sulfonating agents;
* Bamboo, wood, paper fiber bleach;
* Non-ferrous metal mineralizers;
* Wastewater treatment agent;
* Rubber coagulant and so on
(for leather treatment, can make leather soft, plump, tough, with waterproof, anti – folding, wear resistance and other properties.)
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Sodium metabisulphite Dyeing Grade:
* Printing and dyeing mordant;
* Dechlorination agent after fabric bleaching
(used as a dechlorination agent for cotton bleaching and a cotton cooking agent)
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Package:
Payment Details:
| Payment Method | T/T OR 100% L/C AT SIGHT | ||||
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