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| Potassium thiosulfate is a colorless orthorhombic crystal that is soluble in water. When heated, it decomposes into potassium sulfide and potassium sulfate. When exposed to acid, it decomposes to release sulfur dioxide and sulfur. Its hemihydrate is a colorless monoclinic crystal that is hygroscopic, with a relative density of 2.590. It is highly soluble in water but insoluble in ethanol. At 200°C, it loses its crystalline water, and further heating causes it to decompose. Both forms exhibit reducing properties. | |||||||||
10294-66-3
Boss Chemical
10294-66-3
| Potassium thiosulfate Basic information | |
| Product Name: | Potassium thiosulfate |
| CAS: | 10294-66-3 |
| MF: | H3KO3S2 |
| MW: | 154.24 |
| EINECS: | 233-666-8 |
| Mol File: | 10294-66-3.mol |
| Potassium thiosulfate Chemical Properties | |
| density | 1.484 g/mL at 25 °C |
| solubility | insoluble in ethanol |
| form | colorless hygroscopic crystals |
| color | colorless hygroscopic crystals, crystalline |
| Water Solubility | g/100g H2O: 96.1 (0°C), 165.0 (25°C), 312.0 (90°C); solid phase, K2S2O3 · 2H2O (0°C), 3K2S2O3 ·5H2O (25°C), K2S2O3(90°C) [KRU93]; insoluble alcohol [MER06] |
| Merck | 137,777 |
| Stability: | Stable. Incompatible with strong acids, strong oxidizing agents. |
| InChI | InChI=1S/K.H2O3S2.H/c;1-5(2,3)4;/h;(H2,1,2,3,4); |
| InChIKey | CCCGVZRBXSJUOU-UHFFFAOYSA-N |
| SMILES | S(S)(O)(=O)=O.[KH] |
| CAS DataBase Reference | 10294-66-3(CAS DataBase Reference) |
| EPA Substance Registry System | Thiosulfuric acid (H2S2O3), dipotassium salt (10294-66-3) |
