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Photographer's Formulary Ammonium Thiosulfate is a colorless solution (in its liquid state), free of sediments, lightly alkaline, with a distinctive ammonia-like smell. In the photo world, it is mainly used in the production of fixers (hypo).
Handle with care - can cause skin and eye irritation; Avoid contact with skin and clothing. Avoid breathing vapor or mist; Keep container closed. Use only with adequate ventilation. Wash thoroughly after handling.