Platform PP-4 
Assay (iodometric) 99.5-101.0 %
Insoluble matter (10% in water) Max 0.005 %
pH (5% sol in water; 25°C) 6.0-8.4
Nitrogen compounds (as N) Max 0.002 %
Chloride (Cl) Max 0.02 %
Heavy metal (as Pb) Max 0.001 %
Sulphate and sulphite (as SO4) Max 0.1 %
Sulphide (S) Passes test
Appearance Large, colourless crystals or coarse crystalline powder
| CAS No. | 10102-17-7 |
|---|---|
| Molecular Formula | Na2S2O3.5H2O |
| Molecular Weight | 248.17 |
| HS Code | 2832.3000 |
| Packing | 500 G |
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