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Other name : Sodium Pyrosulfite, alias disulfide, or sodium sulfite, or sodium disulfite
Appearance : off-white crystalline powder, White monoclinic crystal or powder
Molecular formula : Na2S2O5
CAS No. : 7681-57-4
EINECS : 231-673-0
HS Code : 28321000
Other name：Sodium Metabisulphite,Sodium Pyrosulfite, alias disulfide, or sodium sulfite, or sodium disulfite
Appearance: off-white crystalline powder, White monoclinic crystal or powder
Molecular formula：Na2S2O5
CAS No.: 7681-57-4
EINECS: 231-673-0
HS Code: 28321000
Food grade:
2. Loose agent (e.g.bread, cracker etc);
3. Antiseptic and germicide (e.g.fruit juice, tinned food etc);
4. Inhibitor and freshen agent (e.g.day lily, seafood, fruit and vegetable etc).
Industrial grade:
1.Mordant: printing and dyeing;
2. Bleach Agent: paper pulp, bamboo and timber, waste water treatment;
3. Rubber solidifying agent.
| Test Item
|
Standard | Result |
| Appearance | WHITE CRYSTAL | Pass |
| Na2S2O5≥ | ≥96.5% | 97.18% |
| SO2≤ | ≤65.0% | 55.5% |
| Iron (Fe)≤ | ≤0.003% | 0.0018% |
| Heavy metal( as Pb) | 5 ppm max | <3ppm |
| Arsenic (As) | 2ppm max | <1ppm |
| Water insoluble matter | 0.05^ max | 0.01% |
Packing in 25kg, 50kg, 1000kg pp woven bag with plastic lining.
