CAS No.: 7772-98-7 Other Names: sodium thiosulphate MF: Na2S2O3 EINECS No.: 231-867-5 Place of Origin: Hebei, China Grade Standard:Industrial Grade Purity: 99% Appearance: colorless monoclinic crystal Application: photographic fixing agent Items Specifications Appearance colorless crystal granular Assay 99.00% Water Insoluble matter 0.01% Sulfide 0.001% Fe 0.002% PH 6.5-9.5 Water solution reaction in accordance with the test