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

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-36

WGK Germany 

3

F 

3-10

TSCA 

Yes

HS Code 

28111990

MSDS

• Language:English Provider:SigmaAldrich

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(12027-43-9)Related Product Information

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