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| | SILICOTUNGSTIC ACID HYDRATE Basic information |
| Product Name: | SILICOTUNGSTIC ACID HYDRATE | | Synonyms: | SILICOTUNGSTIC ACID;SILICOTUNGSTIC ACID HYDRATE;TUNGSTOSILICIC ACID HYDRATE;TUNGSTOSILICIC ACID;WOLFRAMOSILICIC ACID HYDRATE;Silicotungstic acid hydrate, 99.9+% metals basis;TUNGSTOSILICIC ACID HYDRATE GR;TUNGSTOSILICIC ACID HYDRATE, REAGENT GRADE | | CAS: | 12027-43-9 | | MF: | H3O41SiW12(-3) | | MW: | 2893.15 | | EINECS: | 681-167-2 | | Product Categories: | | | Mol File: | 12027-43-9.mol |  |
| | SILICOTUNGSTIC ACID HYDRATE Chemical Properties |
| storage temp. | Store below +30°C. | | solubility | H2O: 0.1 g/mL, clear, colorless | | form | Solid | | color | Light Yellow | | Water Solubility | Soluble in water. | | Merck | 14,8502 | | Exposure limits | ACGIH: TWA 3 mg/m3
NIOSH: TWA 5 mg/m3; STEL 10 mg/m3 | | CAS DataBase Reference | 12027-43-9 |
| Hazard Codes | Xi | | Risk Statements | 36/37/38 | | Safety Statements | 26-36 | | WGK Germany | 3 | | F | 3-10 | | TSCA | Yes | | HS Code | 28111990 |
| | SILICOTUNGSTIC ACID HYDRATE Usage And Synthesis |
| Chemical Properties | White, crystalline powder. Very solu-
ble in water and polar organic solvents; relatively
insoluble in nonpolar organic solvents. Strong acid.
Noncombustible.
| | Uses | Catalyst for organic synthesis, minerals separation, reagent for alkaloids.Tungstosilicic acid hydrate is used to prepare ethylacetate and acetic acid from ethylene. It is used in the preparation of silicotungstate butylmethylimidazolium bromide and charge transfer compounds with Keggin anions. It is also used in catalyst preparation, which is useful for catalytic liquid-phase oxidation of xylene. Further, it acts as a mediator in production of hydrogen through electrolysis of water. | | Uses | Reactant for Preparation of silicotungstate butylmethylimidazolium bromide ionic liquid hybrid material, Synthesis of SnII-substituted Keggin-type polyoxometalates as photocatalysts, Preparation of silicotungstic acid/organically modified silane proton-conducting membranes3, Preparation of charge transfer compounds with Keggin anions, Preparation of catalyst for catalytic liquid-phase oxidation of xylene | | Purification Methods | Extract the acid with diethyl ether from a solution acidified with HCl. The diethyl ether is evaporated under vacuum, and the free acid is crystallised twice [Matijevic & Kerker J Phys Chem 62 1271 1958]. |
| | SILICOTUNGSTIC ACID HYDRATE Preparation Products And Raw materials |
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