上游 纯碱、二氧化硫、活性炭、酒石酸钾钠、硫化黑、硫磺、硫酸、烧碱、五氧化二钒、盐酸 下游 杀虫单、杀虫双、杀虫双水剂、氟磺胺草醚、大蒜素 CAS Number:7772-98-7 Name: Sodium thiosulfate Formula: Na2S2O3 Molecular Weight: 158.11 Deleted CAS: 13773-27-8, 220945-47-1 Synonyms: Thiosulfuric acid, disodium salt (8CI);Ametox;Antichlor;Chlorine Control;Chlorine Cure;Declor-It;Desilube 88;Disodium thiosulfate;Disodium thiosulphate;Hypo;S-Hydril;Sodiumhyposulfite; EINECS: 231-867-5 Density: 1.667 g/cm3 Melting Point: 48.°C Boiling Point: 100 °C Appearance: White powder Hazard Symbols: Xi Risk Codes: 36/37/38 Safety: 24/25-23-36-26 Details Sodium thiosulfate (Na2S2O3), also spelled sodium thiosulphate, is a colorless crystalline compound that is more familiar as the pentahydrate, Na2S2O3·5H2O, an efflorescent, monoclinic crystalline substance also called sodium hyposulfite or “hypo.”
The thiosulfate anion is tetrahedral in shape and is notionally derived by replacing one of the oxygen atoms by a sulfur atom in a sulfate anion. The S-S distance indicates a single bond, implying that the sulfur bears significant negative charge and the S-O interactions have more double bond character. The first protonation of thiosulfate occurs at sulfur.
