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tungsten(VI) oxide

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Identification
Molecular formula
WO3
CAS number
1314-35-8
IUPAC name
dihydroxy(dioxo)tungsten
State
State

At room temperature, tungsten(VI) oxide is a solid. It is stable in air and exhibits properties typical of metal oxides. It does not dissolve in water but can react with alkalis to form soluble tungstates.

Melting point (Celsius)
1 473.00
Melting point (Kelvin)
1 746.00
Boiling point (Celsius)
1 700.00
Boiling point (Kelvin)
1 973.00
General information
Molecular weight
231.84g/mol
Molar mass
231.8400g/mol
Density
7.1600g/cm3
Appearence

Tungsten(VI) oxide typically appears as a fine, yellow crystalline powder. It has a bright yellow color when in the pure form and can also exhibit a greenish tinge depending on the specific form and particle size. This compound is often used in its powder form for various industrial applications.

Comment on solubility

Solubility of Dihydroxy(dioxo)tungsten (WO3)

Dihydroxy(dioxo)tungsten, represented by the chemical formula WO3, exhibits unique solubility characteristics that are essential to its application in various chemical processes. Understanding its solubility is crucial for researchers and practitioners working with this compound.

Key Points about Solubility:

  • Solid-State Solubility: WO3 is generally considered insoluble in water, which poses challenges when attempting to utilize it in aqueous environments.
  • Solvents Influence: While it is insoluble in water, WO3 may exhibit varying degrees of solubility in other liquids, particularly organic solvents.
  • pH Dependency: The solubility of WO3 can be affected by the pH of the surrounding environment. Acidic conditions may facilitate some degree of dissolution, while alkaline conditions could further affect its solubility behavior.
  • Precipitation Factors: The precipitation of tungsten oxides, including WO3, from solution can be influenced by factors such as temperature and concentration.

In summary, while WO3 is predominantly insoluble in water, its solubility can be altered by solvent choice, pH levels, and environmental conditions. Understanding these factors is crucial for optimizing its use in catalysis, sensing, and other chemical applications. Always consider these solubility aspects when working with or studying this compound.

Interesting facts

Interesting Facts About Dihydroxy(dioxo)tungsten (WO3)

Dihydroxy(dioxo)tungsten, commonly known as tungsten trioxide, is a fascinating compound that has attracted significant interest in both scientific research and industrial applications. Here are some key highlights:

  • Electrochromic Properties: WO3 exhibits electrochromic behavior, meaning it can change color in response to an applied voltage. This property makes it ideal for use in smart windows and displays, enhancing energy efficiency in modern architecture.
  • Catalytic Applications: The compound serves as a catalyst in various chemical reactions. It is notably used in the oxidation of alcohols and in the synthesis of other valuable chemical compounds.
  • Photocatalysis: WO3 is also a promising photocatalyst, capable of splitting water and degrading pollutants when exposed to light. This feature holds potential for environmental applications and renewable energy solutions.
  • Nanostructures: Researchers are exploring the synthesis of WO3 in nanostructured forms. These nanomaterials often exhibit unique properties that could lead to advancements in electronics and battery technology.
  • Biomedical Research: Emerging studies investigate the biocompatibility of WO3 and its potential applications in the field of biomedical engineering, particularly for drug delivery systems.

In summary, dihydroxy(dioxo)tungsten is more than just a chemical compound; it is at the intersection of multiple fields, including materials science, environmental technology, and even medicine. With ongoing research, the full potential of WO3 continues to unfold, making it an exciting area of study for both chemists and technology enthusiasts.

Synonyms
Tungstic acid
7783-03-1
Tungstic(VI) acid
dihydroxy(dioxo)tungsten
Dihydrogen wolframate
Tungstic acid, 99%
dihydroxidodioxidotungsten
Tungsten hydroxide oxide
UNII-J4D6K0RX2G
H2WO4
J4D6K0RX2G
Tungstate (WO42-), dihydrogen, (T-4)-
CHEBI:36272
TUNGSTIC(VI) ACID [MI]
WOLFRAMIC ACID, ANHYDROUS
[WO2(OH)2]
EINECS 231-975-2
Tungstate (WO42-), dihydrogen, (beta-4)-
EC 231-975-2
Wolframsaure
(WO2(OH)2)
Tunstic acid
MFCD00011336
Tungstic acid (H2WO4)
Tungsticacid
tungsten acid
DTXCID0071964
AKOS015960973
Tungstic acid, 99.95% metals basis
SB66399
NCI60_009849
PD162531
Tungstic acid, 99.999% trace metals basis
C20679
Q416538
Tungstate (WO42-), hydrogen (1:2), (T-4)-
Tungstic acid, >=99.0% (calcined substance, T), powder
231-975-2