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T2786

Tungstosilicic acid hydrate

Synonym(s):

Silicotungstic acid

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10 G

$55.67

50 G

$109.65

$55.67

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About This Item

Linear Formula:
H4[Si(W3O10)4] · xH2O
CAS Number:
Molecular Weight:
2878.17 (anhydrous basis)
EC Number:
MDL number:
UNSPSC Code:
12352301
PubChem Substance ID:
NACRES:
NA.22

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form

powder

Quality Level

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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This Item
95395383341P0430
Quality Level

100

Quality Level

100

Quality Level

100

Quality Level

100

form

powder

form

powder or crystals

form

powder, chunks or granules

form

powder or crystals

solubility

water: 100 mg/mL, clear, colorless

solubility

water: 0.1 g/mL, clear, colorless

solubility

-

solubility

water: 100 mg/mL, clear, colorless

General description

Tungstosilicic acid hydrate is widely used as a catalyst in esterification, oxidation, and other chemical reactions.[1][2]

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.[3]
  • Synthesis of Sn(II)-substituted Keggin-type polyoxometalates as photocatalysts.[4]
  • Preparation of silicotungstic acid/organically modified silane proton-conducting membranes.[5][6]
  • Preparation of charge transfer compounds with Keggin anions.[7]
  • Preparation of catalyst for catalytic liquid-phase oxidation of xylene.[8]

pictograms

Exclamation mark

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


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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)
Silicotungstic acid/organically modified silane proton-conducting membranes.
Stangar U L, et al.
Journal of Solid State Electrochemistry, 9(2), 106-113 (2005)
Silicotungstic acid supported zirconia: An effective catalyst for esterification reaction
KM Parida, et al.
Journal of Molecular Catalysis. B, Enzymatic, 275, 77-83 (2007)
Heterogenization of a Tungstosilicic Acid Catalyst for Esterification of Bio-Oil Model Compound
P Prasertpong, et al.
Catalysts, 13, 38-38 (2023)
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)

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    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/418/501/product-dating-information-06-25-mk.pdf

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer
    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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