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Views: 19 Author: Site Editor Publish Time: 2020-06-15 Origin: Site
Molecular Formula: Na2SO3
CAS No: 7681-57-4
HS Code: 28321000
Main Uses:
1) Industrial Grade: Dyeing mordant, dechlorinating agent for washed fabric, medical deoxidizer and sulfonating agent, bone black for bamboo, wood and paper fiber, non-ferrous mineral separation agent, waste water disposing agent, rubber coagulator.
2) Food Grade: Bleaching agent (for sugar, pastry, dried slices of tender bamboo shoots, etc), loosening agent (for bread, biscuit, etc), corrosion protection antiseptic (fruit juice, can, etc), antioxidant (for lily flower, sea food, fruit, vegetable, etc)
Specification:
Sodium Metabisulphite Industrial Grade
| ITEM | SPECIFICATION | TEST RESULT |
| PURITY (AS Na2S2O5): | 97.0% MIN | 97.3% |
| SO2 | 65.0%MIN | 65.5% |
| HEAVY METAL (AS Pb) : | 0.001%MAX | 0.0008% |
| WATER INSOLUBLE : | 0.05%MAX | 0.02% |
| IRON (Fe) : | 0.003%MAX | 0.0018% |
| PH VALUE: | 4.0-4.6 | 4.5 |
Sodium Metabisulphite Food Grade
| ITEM | SPECIFICATION | TEST RESULT |
| Na2S2O5 content : | 97.0 %min | 97.23% |
| Heavy metals (as Pb) : | 0.0005%max | 0.0004% |
| Arsenic (As) : | 0.0001%max | 0.0001% |
| Iron (Fe) : | 0.0020%max | 0.0012% |
| Water insoluble : | 0.02%max | 0.01% |
| PH Value : | 4.0-4.5 | 4.4 |
