description
Item | Specification | Test Result |
Na2S2O5 content: | 97.0 % min | 97.36% |
Heavy metals (as Pb): | 0.0005% max | 0.00% |
Iron (Fe): | 0.0050% max | 0.00% |
Water insoluble: | 0.05% max | 0.03% |
PH Value: | 4.0-4.8 | 4.6 |
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