1.Ammonium Thiosulphate, (NH4)2S2O3 2.CAS No.7783-18-8, 3.Photo Grade, colorless transparent liquid Ammonium ThiosulphateUsed as fixer for taking photographic s,key component of silvering electrobath, shielding effect agent, casting protectant of Al-Mg alloy, bactericide and analytical reagent. Ammonium Thiosulfate