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Tungsten(VI) Oxide
(Tungsten Trioxide) WO3

Tungsten(VI) Oxide(Tungsten Trioxide) WO3 Powder 1314-35-8

Tungsten(VI) Oxide, also known as tungsten trioxide or tungstic anhydride, is a chemical compound containing oxygen and the transition metal tungsten. It is soluble in hot alkali solutions. Insoluble in water and acids. Slightly soluble in hydrofluoric acid.


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Tungsten Trioxide

Synonym: Tungstic anhydride,Tungsten(VI) oxide, Tungstic oxide
CAS No. 1314-35-8
Chemical formula WO3
Molar mass 231.84 g/mol
Appearance Canary yellow powder
Density 7.16 g/cm3
Melting point 1,473 °C (2,683 °F; 1,746 K)
Boiling point 1,700 °C (3,090 °F; 1,970 K) approximation
Solubility in water insoluble
Solubility slightly soluble in HF
Magnetic susceptibility (χ) −15.8·10−6 cm3/mol

 

High Grade Tungsten Trioxide Specification

Symbol Grade Abbreviation Formula F.s.s.s(µm) Apparent Density(g/cm³) Oxygen Content Main content (%)
UMYT9997 Tungsten Trioxide Yellow Tungsten WO3 10.00～25.00 1.00～3.00 - WO3.0≥99.97
UMBT9997 Blue Tungsten Oxide Blue Tungsten WO3-X 10.00～22.00 1.00～3.00 2.92～2.98 WO2.9≥99.97

Note:Blue Tungsten mainly mixed ; Packing:In iron drums with double inner plastic bags of 200kgs net each.

 

What is Tungsten Trioxide used for?

Tungsten Trioxide (WO₃) is a versatile and high-performance metal oxide with unique chemical, optical, and electronic properties. It serves as a critical precursor material and a functional compound in a wide array of traditional and advanced technological applications.
 
Our high-purity Tungsten Trioxide is engineered for excellence in the following fields:
 
1. Primary Industrial Precursor
Tungsten Trioxide is the fundamental starting material for the majority of tungsten-based products.
*   Metallic Tungsten & Tungsten Carbide: Reduced to produce tungsten metal powder, which is then used to manufacture hard alloys, tungsten carbide tools, and high-density components.
*   Tungstate Compounds: Synthesized into various tungstates (e.g., calcium tungstate, sodium tungstate), which are essential in numerous downstream applications.
 
2. Functional Pigments & Colorants
Leveraging its intense intrinsic yellow color, WO₃ is a valuable inorganic pigment.
*   Ceramics & Paints: Imparts a stable, durable, and vibrant yellow hue to glazes, ceramics, and industrial paints. It is valued for its heat stability and chemical resistance.
 
3. Advanced Materials & Cutting-Edge Technologies
The functional properties of WO₃ make it a key material in modern technological innovations.
*   Smart Windows & Electrochromic Devices: In the form of thin films, Tungsten Trioxide can reversibly change its color and transparency upon the application of a small electrical voltage. This electrochromic effect is utilized in energy-saving "smart windows" for buildings and automobiles, as well as in displays and rearview mirrors.
*   Gas Sensors: Its electrical conductivity changes in the presence of specific gases (e.g., nitrogen oxides, ozone), making it an excellent and highly sensitive material for solid-state gas sensors used in environmental monitoring, industrial safety, and automotive emission control systems.
*   Photocatalysis & Solar Energy: Tungsten Trioxide is a prominent semiconductor photocatalyst. It absorbs a significant portion of the solar spectrum (including blue light) and can be used for applications such as air/water purification (breaking down organic pollutants) and in the development of photoelectrochemical cells for solar water splitting.
 
4. Niche & Established Applications
*   Fireproofing Agents: Tungstates derived from WO₃ are used to impart flame-retardant properties to textiles, wood, and other materials.
*   X-Ray Scintillators: Calcium tungstate (CaWO₄), produced from WO₃, is a classical phosphor used in X-ray intensifying screens and radiation detectors, converting X-ray energy into visible light.
 
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 Key Advantages of Our Tungsten Trioxide:
 
*   High Purity: Ensures consistent performance and superior quality in downstream synthesis and applications.
*   Versatility: Functions as both a primary chemical feedstock and a high-value functional material.
*   Advanced Forms: Available in various grades, including nano-structured powders and thin-film precursors to meet specific R&D and industrial needs.
 
Disclaimer: The information presented here is for descriptive purposes. It is the responsibility of the user to determine the suitability of this product for their specific application.
 
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Tungsten(VI) Oxide, also known as tungsten trioxide or tungstic anhydride, is a chemical compound containing oxygen and the transition metal tungsten. It is soluble in hot alkali solutions. Insoluble in water and acids. Slightly soluble in hydrofluoric acid.
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