Ammonium Thiosulfate (CAS 7783-18-8) Market Research Report 2025 '@aboutAmmonium thiosulfate is a white or colourless crystalline powder/solid with an ammonia odor. Its chemical formula is H8N2O3S2. The substance is easily soluble in either hot or cold water, and poorly soluble in acetone. Ammonium thiosulfate is very ...