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Tungsten oxide (WO3)

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Tungsten oxide (WO3) molecular structure
Molecular structure

The Sigma-Aldrich catalog lists 10 grades and pack sizes of Tungsten oxide (WO3) (CAS 1314-35-8). Pick the code you need and request a quote for price and lead time from Klar Chem.

CAS1314-35-8
Molecular formulaO3W
Molecular weight231.84 g/mol
IUPAC nametrioxotungsten
SynonymsTUNGSTEN TRIOXIDE · Tungstic anhydride · Tungstic oxide · Tungsten Blue · Tungstic acid anhydride · Wolframic acid, anhydride
Safety & Hazards (GHS) Warning
Irritant Irritant
  • H302 Harmful if swallowed
  • H315 Causes skin irritation
  • H319 Causes serious eye irritation
  • H335 May cause respiratory irritation

⚠️ For information only (source: EU CLP harmonised classification and ECHA notifications, via PubChem); not a substitute for the official Safety Data Sheet (SDS).

Catalog codes and grades

Brand Product / grade Code
Sigma TUNGSTEN(VI) OXIDE NANOWIRES, DIAM. X L 774537-500MG Request Quote
Sigma TUNGSTEN(VI) OXIDE, 99.995% 204781-10G
204781-50G
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Sigma TUNGSTEN(VI) OXIDE, NANOPOWDER, <100 NM 550086-25G
550086-5G
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Sigma TUNGSTEN(VI) OXIDE, POWDER 95410-100G
95410-500G
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Sigma TUNGSTEN(VI) OXIDE, POWDER, <=25MM, >=9 232785-100G
232785-2KG
232785-500G
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For information only; specifications and availability are confirmed at quotation. Prices are not listed.