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Contact SupplierSr. No | Parameters | Unit | Specified value |
---|---|---|---|
1 | Appearance | Visual observation | A white to An off white-creamy, powder |
2 | Odour | Releases SO2, a pungent smell | |
3 | Solubility 5% solution in water | % w/v | Soluble & clear solution |
4 | pH (5% solution) | % w/v | 3.5 – 5.0 |
5 | Purity (as Na2S2O5) | % w/w | Min 95.0 % |
6 | SO2% | % w/w | Min 64.0 % |
7 | Water insoluble matter | % w/w | Max 0.05% |
8 | Iron (as Fe) | % w/w | Max 0.004% |