Sodium metabisulfite (Na2S2O5), is an inorganic compound, is white or yellow crystal, with a strong pungent odor, soluble in water, aqueous solution is acidic, and strong acid contact is released sulfur dioxide and the corresponding salts generated for a long time in the air, then oxidation into sodium sulfate, sodium metabisulfite can not be long time to store.
Product Informations:
| CAS No. | 7681-57-4 |
| EINECE | 231-673-0 |
| HS CODE | 2832100000 |
| MOLECULAR FORMULA | Na2S2O5 |
Specifications:
1) Food Grade
| Items | Specifications | Typical Analysis |
| Colour | / | White or yellowish | White |
| State | / | Crystalline powder | Crystalline powder |
| Na2S2O5 | (%) | 96.5 Min. | 97.1 |
| Fe | (%) | 0.003 Max | 0.0021 |
| Clarity | / | Passed | Passed |
| As | (ppm) | 1.0 Max | 0.85 |
| Heavy Metal(as Pb) | (ppm) | 5.0 Max | 0.04 |
2) Industrail Grade
| Items | Specifications | Typical Analysis |
| Na2S2O5 | (%) | 96.5 Min. | 96.83 |
| Fe | (%) | 0.003 Max | 0.0006 |
| As | (ppm) | 1.0 Max | 0.8 |
| Heavy Metal(as Pb) | (ppm) | 5.0 Max | 2.0 |
Remarks:
1. Packing: plastic woven bag with PE liner.
2. Utilizes China National Standard GB1893-2008.
Packing :
25kg /50kg /1000kg plastic woven bag, or as per customer demanding.
Usage:
Chemical industry
It is used for the production of insurance powder, sulfamethazine, analgin, caprolactam, etc., as well as the purification of phenylpropane sulfone and benzaldehyde. The photographic industry is used as a fixative for the fixer. The perfume industry is used to produce vanillin. Used as a preservative for brewing industry, a rubber coagulant and a bleaching agent for cotton bleaching. Organic intermediates, dyes, and tanning are used as reducing agents for electroplating, wastewater treatment in oil fields, and as a mineralizer for mines.
industry
It is used in printing and dyeing, organic synthesis, printing, tanning, pharmaceutical and other departments; as a preservative, bleaching agent and loosening agent in food processing.
Used as a chemical reagent
(Printing and dyeing, photography, etc.), used as bleach mordant, reducing agent rubber coagulant, also used in organic synthetic pharmaceuticals and spices.
