Sodium metabisulphite USP, NF, BP, Ph. Eur., pure
:7681-57-4
:
:Na₂S₂O₅
:MFCD00167602
:190.11 g/mol
- 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
- Pk
- : 141698.1211: APPC141698.1211
- : 141698.1214: APPC141698.1214