Assay (iodometric) 96.5 - 100 %
Assay (as SO2; iodometric) 65 - 67.4 %
pH (5% solution in water) 3.5 - 5.0
Insoluble in water Max 0.025 %
Chloride (Cl) Max 0.02 %
Thiosulphate (S2O3) Max 0.05 %
Heavy metal (as Pb) Max 0.002 %
Arsenic (As) Max 0.0004 %
Iron (Fe) Max 0.002 %
Appearance White crystalline powder
| CAS No. | 7681-57-4 |
|---|---|
| Molecular Formula | Na2S2O5 |
| Molecular Weight | 190.10 |
| HS Code | 2832.1000 |
| Symbol | GHS05, GHS07 |
| Signal Word | Danger |
| Hazardous Statement | H302-H318 |
| Precaution Statement | P264-P270-P280-P301+P312-P305+P351+P338-P310-P330-P501 |
| Packing | 1 KG |
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