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T2786

Sigma-Aldrich

Tungstosilicic acid hydrate

Synonym(s):

Silicotungstic acid

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About This Item

Linear Formula:
H4[Si(W3O10)4] · xH2O
CAS Number:
12027-43-9
Molecular Weight:
2878.17 (anhydrous basis)
EC Number:
234-719-8
MDL number:
MFCD00150392
UNSPSC Code:
12352301
PubChem Substance ID:
24900077
NACRES:
NA.22

form

powder

solubility

water: 100 mg/mL, clear, colorless

SMILES string

O.O[Si](O)(O)O.O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1.O=[W]2(=O)O[W](=O)(=O)O[W](=O)(=O)O2.O=[W]3(=O)O[W](=O)(=O)O[W](=O)(=O)O3.O=[W]4(=O)O[W](=O)(=O)O[W](=O)(=O)O4

InChI

1S/H4O4Si.H2O.36O.12W/c1-5(2,3)4;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/h1-4H;1H2;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

InChI key

ACTPFSYIGLFGLY-UHFFFAOYSA-N

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General description

Tungstosilicic acid hydrate is widely used as a catalyst in esterification, oxidation, and other chemical reactions.

Application

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 membranes
  • Preparation of charge transfer compounds with Keggin anions
  • Preparation of catalyst for catalytic liquid-phase oxidation of xylene
Tungstosilicic acid can be used as a reactant for:
  • Preparation of silicotungstate butylmethylimidazolium bromide ionic liquid hybrid material.
  • Synthesis of Sn(II)-substituted Keggin-type polyoxometalates as photocatalysts.
  • Preparation of silicotungstic acid/organically modified silane proton-conducting membranes.
  • Preparation of charge transfer compounds with Keggin anions.
  • Preparation of catalyst for catalytic liquid-phase oxidation of xylene.

pictograms

Exclamation mark
GHS07

signalword

Warning

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

target_organs

Respiratory system

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Silicotungstic acid/organically modified silane proton-conducting membranes.
Stangar U L, et al.
Journal of Solid State Electrochemistry, 9(2), 106-113 (2005)
Synthesis of SnII-Substituted Keggin-type Polyoxometalates and Their Photocatalytic Performance.
Deng L and Yang C
Chinese Journal of Applied Chemistry / Ying Yong Hua Xue, 24(2), 139-139 (2007)
Synthesis of proton conducting tungstosilicate mesoporous materials and polymer composite membranes.
Feng F, et al.
Microporous and Mesoporous Materials : The Official Journal of the International Zeolite Association, 81(1-3), 217-234 (2005)
Catalytic liquid phase oxidation of p-xylene using transition metal substituted polyoxometalates.
Alekar N A, et al.
Indian Journal of Chemistry, 39A, 439-441 (2000)
Synthesis and characterization of hybrid molecular material prepared by ionic liquid and silicotungstic acid.
Rajkumar T and Rao G R
Materials Chemistry and Physics, 112(3), 853-857 (2008)
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