FINISHED PRODUCT SPECIFICATION
NO. TEST SPECIFICATION
1. DESCRIPTION COLOURLESS, PRISMATIC CRYSTALS OR WHITE OR CREAMY WHITE POWDER, ODOUR SULPHUROUS
2. SOLUBILITY FREELY SOLUBLE IN WATER, SLIGHTLY SOLUBLE IN ETHANOL (95%)
3. IDENTIFICATION TEST (A & B) SODIUM = +VE & SULPHATE = +VE
4. ACIDITY A SOLUTION IS ACIDIC TO PHENOL RED SOLUTION
5. ARSENIC MAX. 0.004%
6. HEAVY METALS Max.0.002 %
7. IRON Max.0.004 %
8. THIOSULPHATE As Per IP
9. RESIDUAL SOLVENT As Per IP
10. ASSAY 95.0 % - 100.5% OF Na2S2O5
Storage : Store protected from light, Keep containers tightly closed..