CAS Number
7681-57-4
Formula
Na2S2O5
Weight
M: 190,10 EC: 231-673-0 NC: 2832 10 00
Signal Word: Danger
75 H302-EUH031-H318
| Assay (as Na2S2O5) | 95,0-100,5% |
| Assay (as SO2), not less than | 64,0 % |
| pH of 10% solution | 4,0-5,5 |
| Arsenic (as As), not more than | 3 ppm |
| Thiosulphate, not more than | 0,05 % |
| Heavy metals (as Pb), not more than | 0,001 % |
| Iron, not more than | 10 ppm |
| Selenium, not more than | 5 ppm |
| Lead, not more than | 2 ppm |
| Mercury (Hg), not more than | 1 ppm |
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