Sodium metabisulphite USP, NF, BP, Ph. Eur., pure
Supplier: PanReac AppliChem
Synonyms:
Disodium disulphite, di-Sodium disulphite, Sodium pyrosulphite, Disodiumdisulphite, Sodium disulphite
141698.1211
141698.1214
APPC141698.1211EA
55.9
GBP
APPC141698.1211
APPC141698.1214
Sodium metabisulphite USP, NF, BP, Ph. Eur., pure
Sodium metabisulphite
Formula:
Na₂S₂O₅ MW: 190,11 g/mol |
MDL Number:
MFCD00167602 CAS Number: 7681-57-4 |
Specification Test Results
Appearance | Crystals, crystalline powder, white |
Assay (as SO₂) | 65,0 - 67,4% |
Assay (Na₂S₂O₅) | 96,5 - 100,0% |
Identity according to Pharmacopoeias | passes test |
pH of 5% solution | 3,5 - 5,0 |
Appearance of solution | passes test |
Insoluble matter in H₂O | 0,025% |
Chloride (Cl) | 0,02% |
Residual solvents | passes test |
Thiosulphate (S₂O₃) | 0,05% |
Thiosulphate (BP) | passes test |
Heavy metals (as Pb) | 0,002% |
Arsenic (As) | 0,0003% |
Iron (Fe) | 0,002% |
Lead (Pb) | 0,001% |
Thermal decomposition | 150 °C |
pH | 4,0 - 4,8 |
Solubility | Soluble in water |
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