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Safety Information

95395

Sigma-Aldrich

Tungstosilicic acid hydrate

purum p.a.

Synonym(s):

Silicotungstic acid

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About This Item

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

grade

purum p.a.

form

powder or crystals

loss

≤20% loss on ignition

solubility

water: 0.1 g/mL, clear, colorless

anion traces

chloride (Cl-): ≤200 mg/kg
sulfate (SO42-): ≤100 mg/kg

cation traces

Ca: ≤200 mg/kg
Cd: ≤50 mg/kg
Co: ≤50 mg/kg
Cu: ≤50 mg/kg
Fe: ≤50 mg/kg
K: ≤200 mg/kg
Na: ≤3000 mg/kg
Ni: ≤50 mg/kg
Pb: ≤50 mg/kg
Zn: ≤50 mg/kg

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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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

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

JAN Code

95395-BULK:
95395-VAR:
95395-250G:
95395-50G:


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