Tungsten trioxide

Description Chemical Properties hermochromism Uses Preparation References

Product Name: Tungsten trioxide
CAS No.: 1314-35-8
Chemical Name: Tungsten trioxide
Synonyms: WO3;TUNGSTEN OXIDE;Tung;Tungsten blue;CI 77901;Mo 100ppm;Wolframite;tungstenblue;Wolframtrioxid;TUNGSTIC OXIDE
CBNumber: CB1718034
Molecular Formula: O3W
Formula Weight: 231.84
MOL File: 1314-35-8.mol

More

Less

Tungsten trioxide Property

Melting point:

1470-1475 °C

Boiling point:

1837°C (estimate)

Density

7.16 g/mL at 25 °C(lit.)

storage temp.

Room Temperature

solubility

insoluble in H2O, organic solvents; slightly soluble in acid solutions; soluble in alkaline solutions

form

powder

color

Yellow to greenish-yellow

Specific Gravity

7.16

Water Solubility

insoluble

Merck

14,9817

crystal system

Monoclinic

Space group

P21/a

Lattice constant

a/nm	b/nm	c/nm	α/o	β/o	γ/o	V/nm3
0.7285	0.7517	0.3835	90	90.9	90	0.21

Exposure limits

ACGIH: TWA 3 mg/m3
NIOSH: TWA 5 mg/m3; STEL 10 mg/m3

InChIKey

ZNOKGRXACCSDPY-UHFFFAOYSA-N

CAS DataBase Reference

1314-35-8(CAS DataBase Reference)

NIST Chemistry Reference

Tungsten trioxide(1314-35-8)

EPA Substance Registry System

Tungsten trioxide (1314-35-8)

More

Less

Safety

Hazard Codes: Xn
Risk Statements: 22-36/37/38
Safety Statements: 26-36-37/39
WGK Germany: -
RTECS: YO7760000
F: 21
TSCA: Yes
HS Code: 28259012
Hazardous Substances Data: 1314-35-8(Hazardous Substances Data)
Toxicity: rat,LD50,oral,1059mg/kg (1059mg/kg),BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)BEHAVIORAL: EXCITEMENTBEHAVIORAL: MUSCLE WEAKNESS,Hygiene and Sanitation Vol. 31(7-9), Pg. 197, 1966.

More

Less

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H302Harmful if swallowed

Precautionary statements

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P330Rinse mouth.

More

Less

N-Bromosuccinimide Price

Sigma-Aldrich

Product number: 204781
Product name: Tungsten(VI) oxide
Purity: powder, 99.995% trace metals basis
Packaging: 10g
Price: $160
Updated: 2024/03/01

Sigma-Aldrich

Product number: 204781
Product name: Tungsten(VI) oxide
Purity: powder, 99.995% trace metals basis
Packaging: 50g
Price: $495
Updated: 2024/03/01

Alfa Aesar

Product number: 011828
Product name: Tungsten(VI) oxide
Purity: 99.8% (metals basis)
Packaging: 500g
Price: $235
Updated: 2024/03/01

Alfa Aesar

Product number: 011828
Product name: Tungsten(VI) oxide
Purity: 99.8% (metals basis)
Packaging: 100g
Price: $76.9
Updated: 2023/06/20

Strem Chemicals

Product number: 74-3105
Product name: Tungsten(VI) oxide (99.995%-W) PURATREM
Packaging: 10g
Price: $106
Updated: 2024/03/01

More

Less

Tungsten trioxide Chemical Properties,Usage,Production

Description

Tungsten trioxide is a chemical compound consisting of oxygen and the transition metal tungsten. It occurs naturally but rarely in the form of hydrates in some kinds of minerals. It has various applications. In industry, it can be used for making x-ray screen phosphors, fireproofing fabrics and gas sensors as well as a pigment in ceramics and paints. It can also be used for the preparation of electrochromic windows or smart windows. In addition, it can be used in semiconductors. It, together with titanium dioxide, has the potential to become an efficient photo-catalyst under visible light irradiation. Recent study has shown that mesoporous tungsten trioxide polyaniline nanocomposite can be used as an anode material for high-performance lithium-ion batteries.

Chemical Properties

Tungsten trioxide is a bright canary-yellow coloured powder which becomes dark-orange on heating, but regains its bright yellow colour on cooling. A very slight admixture of sodium salt imparts to the oxide a greenish tint which no amount of oxidation can remove (Roscoe). It also becomes greenish on exposure to light. Tungsten trioxide has been obtained in the crystalline state by Debray, by igniting a mixture of tungstate and carbonate of sodium in a current of hydrochloric acid, when the trioxide is obtained in olive-green rectangular prisms which sublime at a white heat. The crystalline trioxide has also been prepared by heating hydrated tungstic acid with borax in a porcelain furnace (Nordenskjold). The specific gravity of tungsten trioxide thus obtained is 6.34.

When heated in a current of hydrogen to 250° the trioxide is converted into the blue oxidc, 2WO3+WO2 and if the heat be raised to dull redness the brown oxide, WO2 is formed, whilst at a higher temperature the metal is obtained. Acted upon by reducing agents such as zinc and hydrochloric acid, stannous chloride, or organic matter, tungsten trioxide is trans-formed successively into the blue and brown oxides.

hermochromism

hermochromism is the property of substances to changecolour due to a change in temperature and WO3is an attractive example for this property. On cooling the oxide by liquid nitrogen down to -196°C, a sudden change occurs from yellow to white, which then alters to a bluish-white colour between -50 and -27°C. At room temperature it becomes pale lemon-yellow again. On furtherheating to 200 – 300°C, WO3becomes dark yellow, changingto a deep orange colour at 400 to 500°C .

These reversible colour changes are linked to changes in the electronic properties of WO3 which alter due to changesof the internal symmetry of the WO3crystals (through alterations of the lattice arrangements).

Uses

Tungsten trioxide is a thermally stable and water insoluble tungsten compound. Tungsten trioxide andTungsten blue oxides are both used in the production of tungsten metal powders. The greatmajority of metallic tungsten is used to make cemented carbide parts, and theremainder is used in manufacturing components for lighting, electrical, electronic,heating, and welding applications; and in tool steels, alloys, catalysts, pigments, andhigh-temperature lubricants.

Preparation

Yellow tungsten trioxide is a finely divided, yellow, crystalline powder. It is produced by roasting ammonium paratungstate at closely controlled temperatures to drive off combined water and ammonia.

References

[1]Momeni, Mohamad Mohsen, and Yousef Ghayeb. "Photochemical deposition of platinum on titanium dioxide–tungsten trioxide nanocomposites: an efficient photocatalyst under visible light irradiation." Journal of Materials Science: Materials in Electronics 27.2 (2016): 1062- 1069.
[2]Li, Bin, et al. "Mesoporous Tungsten Trioxide Polyaniline Nanocomposite as an Anode Material for High‐Performance Lithium‐ Ion Batteries."ChemNanoMat 2.4 (2016): 281-289.
[3]Hunge, Y. M., et al. "Photoelectrocatalytic degradation of methyl blue using sprayed WO3 thin films." Journal of Materials Science: Materials in Electronics 27.2 (2016): 1629-1635.
[4]Albalshi, Madleen Ahmad Mohammad. Electrochemical properties of Sol-gel WO3 films Co-doped with Ti and Zn. Diss. 2016.

Chemical Properties

Canary-yellow, heavy powder, darkorange when heated and regains original color on cooling. Insoluble in water, soluble in caustic alkalies, soluble with difficulty in acids. Noncombustible.

Physical properties

Heavy yellow powder; turns dark orange on heating; reverts back to yellow on cooling; density 7.2 g/cm³; melts at 1,472°C; insoluble in water; slightly soluble in acids; soluble in caustic alkalies.

Uses

It is used in tungsten and tungstate manufacturing which are used as X-ray screens and for fire proofing fabrics. It is used as a ceramic pigment. Nanowires of Tungsten (VI) oxide are capable of absorbing a higher percentage of the sun radiation since it absorbs blue light.

Uses

Tungsten oxide (WO3) is used to make tungsten alloys. Tungsten oxide is also used as fireproofing for various surfaces and is used as a yellow pigment in ceramics.

Uses

manufacture of tungstates which are used for x-ray screens and for fireproofing fabrics.

Preparation

Tungsten trioxide is obtained as an intermediate in recovery of tungsten from its minerals (See Tungsten). In commerical processes tungstic acid, H2WO4, obtained from the mineral scheelite, may either be decomposed at high temperatures to form trioxide or dissolved in ammonium hydroxide solution and evaporated to yield ammonium paratungstate (APT) crystals, 5 (NH₄)₂O?12WO₃?11H₂O. The APT crystals are then washed, dried, and calcined at elevated temperatures to form tungsten trioxide
Tungsten trioxide, in general, can be made by heating metallic tungsten, its carbides, its lower oxides, or tungstic acid in air.

General Description

Tungsten(VI) oxide (WO₃) is a semiconducting material with excellent electrochromic properties. It is a cost efficient material with a high optical modulation. It can be synthesized by a variety of methods which include chemical vapor deposition, electrodeposition, and other sol-gel based coating processes.

Hazard

Toxic material.

Flammability and Explosibility

Not classified

Safety Profile

Moderately toxic by ingestion. Can react violently with ClF3, Li, Cl2. See also TUNGSTEN COMPOUNDS.

Structure and conformation

The crystal structure of tungsten trioxide is temperature dependent. It is tetragonal at temperatures above 740℃, orthorhombic from 330 to 740 °C, monoclinic from 17 to 330 °C, triclinic from -50 to 17 °C, and monoclinic again at temperatures below -50 °C.The most common structure of WO3 is monoclinic with space group P21/n.

Tungsten trioxide Preparation Products And Raw materials

Raw materials

WO CI Sodium tungstate Tungsten Concentrate Sodium hydroxide Ammonia

Preparation Products

Tungsten carbide Calcium tungstate Phosphotungstic acid 44-hydrate Tungsten

More

Less

Tungsten trioxide Suppliers

Belgium 1 China 276 China Hong Kong 1 Europe 3 France 2 Germany 4 India 22 Japan 5 Slovakia 1 Switzerland 1 United Kingdom 6 United States 41 Global 363

Alfa Chemistry

Tel: 1-516-6625404
Fax: 1-516-927-0118
Email: support@alfa-chemistry.com
Country: United States
ProdList: 9171
Advantage: 60

Alfa Chemistry

Tel
Fax: 1-516-927-0118
Email: Info@alfa-chemistry.com
Country: United States
ProdList: 24072
Advantage: 58

Aladdin Scientific

Tel: +1-+1(833)-552-7181
Email: sales@aladdinsci.com
Country: United States
ProdList: 52925
Advantage: 58

Aladdin Scientific

Tel: +1-+1(833)-552-7181
Email: sales@aladdinsci.com
Country: United States
ProdList: 57505
Advantage: 58

Aceschem Inc.

Tel: +1-817863-6948 +1-（817）863-6948
Email: sales@aceschem.com
Country: United States
ProdList: 19632
Advantage: 58

Sarchem Laboratories, Inc.

Tel: --
Fax: --
Email: info@sarchemlabs.com
Country: United States
ProdList: 736
Advantage: 58

Noah Chemicals

Tel: --
Fax: --
Email: solutions@noahtech.com
Country: United States
ProdList: 881
Advantage: 58

United States Biological

Tel: --
Fax: --
Email: chemicals@usbio.net
Country: United States
ProdList: 6214
Advantage: 80

ProChem, Inc.

Tel: --
Fax: --
Email: prochem1@aol.com
Country: United States
ProdList: 1691
Advantage: 66

GFS Chemicals Inc

Tel: --
Fax: --
Email: service@gfschemicals.com
Country: United States
ProdList: 2329
Advantage: 58

Strem Chemicals, Inc.

Tel: --
Fax: --
Email: info@strem.com
Country: United States
ProdList: 4910
Advantage: 86

Riedel-de Haen AG

Tel: --
Fax: --
Country: United States
ProdList: 6773
Advantage: 87

Anvia Chemicals, LLC

Tel: --
Fax: --
Email: sales@anviachem.com
Country: United States
ProdList: 3933
Advantage: 0

Naugra Export

Tel: --
Fax: --
Country: United States
ProdList: 1332
Advantage: 47

2A PharmaChem USA

Tel: --
Fax: --
Email: sales@2apharmachem.com
Country: United States
ProdList: 6137
Advantage: 39

HONEST JOY HOLDINGS LIMITED

Tel: --
Fax: --
Email: sales@honestjoy.cn
Country: United States
ProdList: 6675
Advantage: 54

Advance Scientific & Chemical

Tel: --
Fax: --
Email: sales@advance-scientific.com
Country: United States
ProdList: 6419
Advantage: 71

3B Scientific Corporation

Tel: --
Fax: --
Email: sales@3bsc.com
Country: United States
ProdList: 6718
Advantage: 47

Nanostructured & Amorphous Materials Inc.

Tel: --
Fax: --
Email: sales@nanoamor.com
Country: United States
ProdList: 66
Advantage: 72

TimTec Corporation

Tel: --
Fax: --
Country: United States
ProdList: 1945
Advantage: 58

Sciencelab.com, Inc.

Tel: --
Fax: --
Email: accounting@sciencelab.com
Country: United States
ProdList: 4159
Advantage: 82

Loba Chemie Pvt. Ltd.

Tel: --
Fax: --
Country: United States
ProdList: 1945
Advantage: 71

ESPI Corp Inc.

Tel: --
Fax: --
Email: sales@espimetals.com
Country: United States
ProdList: 507
Advantage: 76

Reade Advanced Materials

Tel: --
Fax: --
Email: info@reade.com
Country: United States
ProdList: 206
Advantage: 77

City Chemical LLC

Tel: --
Fax: --
Email: sales@citychemical.com
Country: United States
ProdList: 6708
Advantage: 72

Alfa Aesar

Tel: --
Fax: --
Email: tech@alfa.com
Country: United States
ProdList: 6814
Advantage: 81

MATERION Inc.

Tel: --
Fax: --
Email: AdvancedMaterials@Materion.com
Country: United States
ProdList: 1079
Advantage: 74

GFS Chemicals

Tel: --
Fax: --
Email: gfschem@gfschemicals.com
Country: United States
ProdList: 3403
Advantage: 75

Pfaltz & Bauer, Inc.

Tel: --
Fax: --
Email: sales@pfaltzandbauer.com
Country: United States
ProdList: 6828
Advantage: 72

Chemat Technology, Inc.

Tel: --
Fax: --
Email: info@chemat.com
Country: United States
ProdList: 569
Advantage: 72

D.F. Goldsmith Chemical & Metal Corp.

Tel: --
Fax: --
Country: United States
ProdList: 793
Advantage: 66

Spectrum Chemicals & Laboratory Products

Tel: --
Fax: --
Email: sales@spectrumchemical.com
Country: United States
ProdList: 6699
Advantage: 77

MP Biomedicals, Inc.

Tel: --
Fax: --
Country: United States
ProdList: 6561
Advantage: 81

Kiran Light Laboratories

Tel: --
Fax: --
Country: United States
ProdList: 863
Advantage: 43

NILE CHEMICALS

Tel: --
Fax: --
Email: nilechem@vsnl.net
Country: United States
ProdList: 1369
Advantage: 61

Pechiney

Tel: --
Fax: --
Email: chemicals@pechiney.com
Country: United States
ProdList: 606
Advantage: 55

MV Laboratories, Inc.

Tel: --
Fax: --
Email: info@mvlaboratories.com
Country: United States
ProdList: 581
Advantage: 42

City Chemicals Corporation

Tel: --
Fax: --
Country: United States
ProdList: 6460
Advantage: 72

Fisher Scientific

Tel: --
Fax: --
Email: sales@fishersci.com
Country: United States
ProdList: 2337
Advantage: 86

Aithaca Chemical Corp.

Tel: --
Fax: --
Email: sales@aithaca.com
Country: United States
ProdList: 1684
Advantage: 30

Atlantic Equipment Engineers

Tel: --
Fax: --
Email: info@micronmetals.com
Country: United States
ProdList: 177
Advantage: 72

More

Less

View Lastest Price from Tungsten trioxide manufacturers

Shaanxi Dideu Medichem Co. Ltd

Product: Tungsten trioxide 1314-35-8
Price: US $0.00-0.00/KG
Min. Order: 10mg
Purity: 99%
Supply Ability: 2000tons
Release date: 2020-01-16

Hebei Weibang Biotechnology Co., Ltd

Product: Tungsten trioxide 1314-35-8
Price: US $0.00/KG
Min. Order: 1KG
Purity: 99%
Supply Ability: 500000kg
Release date: 2024-10-25

Hebei Yanxi Chemical Co., Ltd.

Product: Tungsten trioxide 1314-35-8
Price: US $25.00-5.00/kgkg
Min. Order: 1kgkg
Purity: 0.99
Supply Ability: 20
Release date: 2023-09-26

1314-35-8, Tungsten trioxideRelated Search:

Chromium(VI) oxide Sulfur trioxide Aluminum oxide Tungsten Tungsten carbide Diantimony trioxide Molybdenum trioxide Chromium(III) oxide TIN(II) OXIDE Neodymium oxide Zirconium dioxide Zinc oxide Cerium dioxide Samarium oxide Tricobalt tetraoxide Cupric oxide Lanthanum oxide Cyclohexene oxide

CI 77901

TUNGSTEN TRIOXIDE 99.999%

TUNGSTEN TRIOXIDE, 99.5%

Tungsten(VI)oxide(99.9994%-W)PURATREM

Tungsten(VI)oxide(min.99.8%-W)

Tungsten(VI)oxide,sinteredlumps(99.99%-W)PURATREM

tungsten(vi) oxide, puratronic

TUNGSTENOXIDE,POWDER

Wolframtrioxid

TUNGSTEN(VI) OXIDE: 99.9994% PURATREM

TUNGSTEN(VI) OXIDE: 99.7%

TUNGSTEN(VI) OXIDE: 99.8%

TUNGSTEN OXIDE YELLOW (CARBIDE GRADE MILLED)

TUNGSTEN(VI) OXIDE, SINTERED LUMPS: 99.99%, PURATREM

TUNGSTIC ANHYDRIDE

TUNGSTIC OXIDE

TUNGSTEN(VI) OXIDE

TUNGSTEN TRIOXIDE

TUNGSTEN OXIDE

TUNGSTEN OXIDE VIOLET-BLUE

TUNGSTEN OXIDE YELLOW

TUNGSTEN OXIDE YELLOW-GREEN

TUNGSTEN(+6)OXIDE

TUNGSTEN(6) OXIDE

Tungsten blue

Tungsten oxide (WO3)

TUNGSTEN(VI) OXIDE, NANOPOWDER, <100NM

TUNGSTEN(VI) OXIDE EXTRA PURE

TUNGSTEN(VI) OXIDE, 99.995%

TUNGSTEN(VI) OXIDE, POWDER, CA. 20 MICRO N, 99+%

TUNGSTEN (VI) OXIDE, 99+%

TUNGSTEN (VI) OXIDE, 12-18UM 99.98%

TUNGSTEN (VI) OXIDE, 99.999%

TUNGSTEN (VI) OXIDE, SINTERED LUMPS (99.99%-W) SPECTRO

TUNGSTEN (IV) OXIDE (TUNGSTEN TRIOXIDE)

Wolfram(VI) trioxide

Tungsten(VI) oxide, 99.8% (metals basis)

Tungsten(VI) oxide, Puratronic(R), 99.998% (metals basis excluding Mo), Mo 100ppm

Tungsten trioxide: (Tungsten(VI) oxide)

Tungsten(VI) oxide, Puratronic, 99.998% (metals basis excluding Mo), Mo 100ppm

Tungsten (VI) oxide, milled, 99.8% (metals basis)

Tungsten(VI)Trioxide

Tungsten(VI) oxide (metals basis)

Tungsten(VI) oxide,Tungstic anhydride

Tungsten(VI)oxide/ 99.9%

Tungsten(VI) oxide (99.995%-W) PURATREM

TUNGSTIC OXIDE, 99.5% WO3

Tungsten trioxid

Tungsten trioxide SynonyMs Tungsten(VI) oxide

Tungsten trioxide, 60nM

Tungsten trioxide nanowires

Tungsten(VI)Oxide Nanopowder <100NM (BET)

Tungsten(VI) oxide nanowires, diam. x L ~50 nm x 10 mum

Tungsten(VI) oxide powder, <=20 mum, >=99% trace metals basis

Tungsten(VI) oxide powder, 99.995% trace metals basis

Tungsten(VI) oxide, 99.995% trace metals basis excluding Mo

Tungsten(VI) oxide, 99.5% trace metals basis

Tungsten(VI) oxide nanopowder, <100 nM particle size (TEM)