CAS Number
7772-98-7
Formula
Na2S2O3
Weight
M: 158,13 EC: 231-867-5 NC: 2842 90 80
| Minimum assay (Iodom.) | 99,0 % |
| pH of 5% solution | 6,0-8,4 |
| MAX. IMPURITIES | |
| Insoluble matter in H2O | 0,01 % |
| Loss on drying at 105°C | 1 % |
| Chloride (Cl) | 0,05 % |
| Sulphate and Sulphite (as SO4) | 0,5 % |
| Sulphide (S) | 0,0005 % |
| Ca | 0,004 % |
| Cd | 0,001 % |
| Co | 0,001 % |
| Cu | 0,001 % |
| Fe | 0,001 % |
| K | 0,01 % |
| Ni | 0,001 % |
| Pb | 0,001 % |
| Zn | 0,001 % |
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