Tungsten oxide (WO3)

Tungsten oxide (WO3)

CAS Number
1314-35-8
Molecular Formula
O3W
Photocatalysts & Pigment IntermediatesElectrochromic Materials & Sputtering TargetsWO3 for Electrochromic Smart WindowsYellow Tungsten Oxide for PhotocatalysisIntermediate for Tungsten Metal Powder ReductionGas Sensors based on Tungsten OxideTungsten Trioxide Thin Film Deposition

About Tungsten oxide (WO3)

Source high-purity Yellow Tungsten Oxide (CAS 1314-35-8) from Scimplify, one of the trusted global tungsten oxide supplier globally. Yellow tungsten oxide, or tungsten trioxide (WO₃), is the most stable and commercially prevalent oxide of tungsten. Within the Metallurgy, Speciality Chemicals, and Advanced Materials hie...

Synonyms

  • Tungsten oxide
  • Tungstic acid
  • Tungstentrioxide
  • 2-Heptylmalonicacid
  • Tritungsten nonaoxide

Tungsten oxide (WO3) Specifications

CAS Number
1314-35-8
Molecular Formula
O3W
Molecular Weight
231.84
IUPAC NameORBotanical Name
trioxotungsten
Canonical SMILES
O=[W](=O)=O
InChI Key
ZNOKGRXACCSDPY-UHFFFAOYSA-N
InChI
1S/3O.W
EINECS Number
215-231-4
MDL Number
MFCD00011466
HSN No
28259090
Molecular Weight
231.84
Melting Point (Experimental)
1472°C
Boiling Point (Experimental)
1700°C
Density (Experimental)
7.2 g/cm³
Physical State
Solid
Odour
Odourless
Assay
99.04%
GHS Hazard Statements
H335 (87.5%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation
GHS Hazard Statements
H413 (18.8%) May cause long-lasting harmful effects to aquatic life [Hazardous to the aquatic environment, long-term hazard]

Electronics & semiconductors

Ultra-high-purity WO₃ (99.99%+, 4N) is pressed into sputtering targets for thin-film deposition in displays, optoelectronics, anti-reflective and IR-control coatings, and semiconductor manufacturing, where oxygen stoichiometry and trace-metal control are critical.

Metallurgy & hard-metal tooling

The largest use. WO₃ is reduced under hydrogen to tungsten metal powder, then carburised into tungsten carbide for cutting tools, mining and drilling inserts, dies, moulds, and wear parts. The particle size of the WO₃ directly governs the grain size of the powder, which sets carbide hardness and toughness — fine FSSS grades for micro-grain carbides, coarser grades for tougher mining parts. (Grade: 99.9–99.95%)

Petrochemical & refining catalysts

WO₃ serves as a non-corrosive, thermally stable catalyst for hydrodesulfurization, oxidation, and organic synthesis, a broad global requirement as low-sulfur fuel standards and cleaner-process mandates spread across refining markets. (Grade: 99.9%+)

SCR deNOx catalysts (V₂O₅–WO₃/TiO₂)

WO₃ is the promoter in the dominant catalyst for removing NOₓ from flue gas, used across power generation, cement, steel, and waste-to-energy. Demand is global and recurring, driven by tightening air-emission regulations and spent-catalyst replacement cycles. Buyers specify high purity and surface area for uniform loading.

Electrochromic smart glass

WO₃ is the benchmark electrochromic material, holding roughly half the active-material market, switching clear to blue under voltage in smart façades, skylights, automotive sunroofs, and mirrors. Growth is global, tied to energy-efficient building and vehicle adoption. Buyers need high-purity material suited to coating, sol-gel, or thin-film routes.

Gas Sensors & Energy Storage Materials

Acts as a functional semiconductor oxide in chemiresistive gas sensors for detecting target gases (NOx, NH₃, H₂S) and as an electrode additive in advanced energy storage architectures.

  1. Tungsten oxide
  2. Tungstic acid
  3. Tungstentrioxide
  4. 2-Heptylmalonicacid
  5. Tritungsten nonaoxide

Tungsten oxide (WO3) FAQs

Minimum Order Quantity

25 kg (pilot) · 1 MT (commercial)

Lead Time

3 – 5 weeks ex-works

Incoterms

FOB · CIF

Packaging

20 L pails, 200 L HDPE drums, 1000 L IBC

Regional Availability

India · EU · Middle East · Southeast Asia

Documentation

SDS · COA · TDS available on request

Compliance & Quality

REACH registered*

GHS/SDS available

ISO 9001:2015 site*

RoHS compliant*

Global sourcing network

Consistent quality & reliability

End-to-end technical support

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