
Chemical Formula:Na2S2O5
Cas:7681-57-4
Description:This substance presents as a white or faintly yellow crystalline powder, possessing a potent pungent odor. Its relative density is around 1.48. It demonstrates high solubility in water, and the resulting aqueous solution exhibits acidic characteristics. When placed in water, it undergoes a hydrolysis process, generating.
TEST ITEMS | TEST STANDARD | TEST RESULT |
Na2S2O5 | ≥96.5% | 97.42% |
FERRON(Fe) | ≤0.005% | 0.001% |
WATER INSOLUBLE | ≤0.05% | 0.02% |
As | ≤0.0001% | <0.0001% |
HEAVY METAL(Pb) | ≤0.0005% | <0.0002% |
CLARITY | PASS | PASS |
APPEARANCE | WHITE OR LIGHT YELLOW CRYSTALLINE POWDER | PASS |
CONCLUSION | THE ABOVE PRODUCT COMPLIES WITH INDUSTRIAL GRADE |











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