Description	Properties: Colorless, transparent single oblique crystals, specific gravity 1.729. Its soluble in water easily, with strong reducing property. Applications: Used in photographic, electroplate, purifying soft water and tanning processing hides, it also can be used as reducing agent, deoxidizer, sulfur dyeing agent, anti-white agent, detergent, disinfectant and color coat agent, etc.
Table	Grade Photo Tech Na2S2O3· 5H2O 99.0% Min 99.0% Min Insoluble matter in water 0.01% Max 0.01% Max Na2S 0.001% Max 0.001% Max                                                                                                             Fe 0.002% Max 0.002% Max PH value (200g/L solution) 6.5-9.5 6.5-9.5