 |
RAWCHEM
22094
SMBS
Sodium Metabisulfite
Sodium Pyrosulfite, Disodium Disulphite
7681-57-4
190.11
Na2S2O5
231-673-0
2832100000
Product Parameters
Appearance: white crystal powder
Physical and Chemical Data:
| Melting Point | Density |
| 150 ºC | 1.48 g/cm3 |
Solubility: soluble in water, as acidic aqueous solution. Soluble in glycerin, slightly soluble in ethanol.
Main indexes:
| Index | Technical Grade | Food Grade |
| Appearance | White crystal powder | |
| Main content (Na2S2O5) by wt % | 97.0 min | 97.5 min |
| Fe (as content Fe) by wt % | 0.0001 max | 0.0001 max |
| Water-insoluble by wt % | 0.02 max | - |
Heavy metal content (Pb) by wt | - | 0.0002 max |
| Clarity | - | Clear |
Technical Grage:
Used for printing and dyeing industry;
Used in purification of chloroform and benzaldehyde;
Used as a fixative ingredientsIn photographic industry;
Used for the production of vanillin In spices industry;
Used in the production of rongalite, sulfanilamide dimethyl pyrimidine, analgin, caprolactam, etc;
Also used as the rubber curing agent and the bleached cotton dechlorinating agent.
Food Grade:
Used as a bleaching agent, preservative, bulking agent, antioxidant, stabilizer, color-protecting and antistaling agent.
Product Parameters
Appearance: white crystal powder
Physical and Chemical Data:
| Melting Point | Density |
| 150 ºC | 1.48 g/cm3 |
Solubility: soluble in water, as acidic aqueous solution. Soluble in glycerin, slightly soluble in ethanol.
Main indexes:
| Index | Technical Grade | Food Grade |
| Appearance | White crystal powder | |
| Main content (Na2S2O5) by wt % | 97.0 min | 97.5 min |
| Fe (as content Fe) by wt % | 0.0001 max | 0.0001 max |
| Water-insoluble by wt % | 0.02 max | - |
Heavy metal content (Pb) by wt | - | 0.0002 max |
| Clarity | - | Clear |
Technical Grage:
Used for printing and dyeing industry;
Used in purification of chloroform and benzaldehyde;
Used as a fixative ingredientsIn photographic industry;
Used for the production of vanillin In spices industry;
Used in the production of rongalite, sulfanilamide dimethyl pyrimidine, analgin, caprolactam, etc;
Also used as the rubber curing agent and the bleached cotton dechlorinating agent.
Food Grade:
Used as a bleaching agent, preservative, bulking agent, antioxidant, stabilizer, color-protecting and antistaling agent.
