Sodium Thio Sulphate Crystal is known to be utilized in formulation of antidote for cyanide positioning, treatment of calciphylaxis, and as topical antifungal agent. It has chemical formula Na2S2O3 and molar mass of 158.11 g/mol in anhydrous form. This is an inorganic compound which appears as white colored crystals. It also finds application for gold extraction as an alternative for cyanide. Having ability to lower chlorine levels, Sodium Thio Sulphate Crystal is utilized for dechlorination of swimming pools, tap water, aquariums, and spas. It can neutralize chlorine easily hence finds application in bacteriological assessment of water for promoting survival of coliform bacteria.