Sodium Thiosulphate Standard Solution 0.02 M is a clear, colorless, standardized, and ready-to-use analytical reagent used as a titrant (0.02 N) for redox titrations, particularly in iodometry. It acts as a reducing agent to determine the concentration of oxidizing agents, such as in water quality testing for iodine or chlorine.Sodium Thiosulphate Standard Solution 0.02 M (approx. 0.02 N) is primarily used in analytical chemistry for redox (iodometric) titrations to determine the concentration of oxidizing agents, such as chlorine, bromine, and copper. It acts as a dechlorinating agent in water treatment and a reducing agent in laboratory, industrial, and medical applications.