【Product name】sodium thiosulfate;sodium hyposulfite;hypo
【Structure or Molecular formula】Na2S2O3_5H2O
【CAS No.】10102-17-7
【Relative molecular weight or atomic weight】248.18
【 Density】1.729(11℃)
【Melting point (℃) 】40～45
【 Property 】 colorless transparent monoclinic crystal.
【 Dissolve situation 】 miscible with water and oil of turpentine, hardly soluble in ethanol.
【 Uses 】 have a reduction. Used for photographic fixing agent, chlorine agent and analytical reagent, and used for leather tanned leather, by extracting silver ore, etc. There are allergy effect. Clinical used for skin itching, chronic urticaria, drug eruption, Cyanide agent arsenic poisoning, etc.
【Preparation or source 】 by sodium sulfite cooking with sulfur, after filtration, evaporation, crystallization and made.
【other】 in 33 ℃ above weathering in dry air, at 48 ℃ decomposition, burning decomposition of sodium sulphide and sodium sulfate. Anhydrous material Density is 1.667. Aqueous solution is weakly alkaline reaction. In strong acid decomposition and precipitation sulfur and sulfur dioxide.
