Silicotungstic Acid
Title: Silicotungstic Acid
CAS Registry Number: 12520-88-6
CAS Name: Tungstosilicic acid
Molecular Formula: H4O40SiW12
Molecular Weight: 2878.17
Percent Composition: H 0.14%, O 22.24%, Si 0.98%, W 76.65%
Line Formula: H4[SiO4.(W3O9)4]
Literature References: Prepn of hydrated compd: Grüttner, Jander in Handbook of Preparative Inorganic Chemistry vol. 2, G. Brauer, Ed. (Academic Press, New York, 2nd ed., 1965) pp 1717-1718.
 
Derivative Type: Hydrate
Properties: White to slightly yellow, deliquesc crystals. Very sol in water, alcohol. Keep tightly closed.
 
Use: Preparing heavy solns for separating minerals; as a mordant for basic aniline dyes; as a reagent for pptn and determination of alkaloids.

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