Sodium Thiosulfate

Photography (fixing agent to dissolve unchanged silver salts from exposed negatives), chrome tanning, removing chlorine in bleaching and papermaking, textile industry, extraction of silver from its ores, dechlorination of water, mordant, reagent, bleaching, reducing agent in chrome dyeing, salt sequestrant. flue gas purification, leather tanning, graphite lubricant additive, soaps and shampoos.