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Name	Tungsten trioxide	EINECS	215-231-4
CAS No.	1314-35-8	Density	7.16 g/mL at 25 °C(lit.)
PSA	51.21000	LogP	-0.35640
Solubility	Insoluble in water	Melting Point	1470-1475 °C
Formula	WO₃	Boiling Point	~1700oC
Molecular Weight	231.85	Flash Point	N/A
Transport Information	N/A	Appearance	yellow to greenish-yellow powder
Safety	26-36-37/39	Risk Codes	22-36/37/38
Molecular Structure		Hazard Symbols	Xn
Synonyms	C.I. 77901;Ditungsten hexaoxide;Tritungsten nonaoxide;Tungsten oxide;Tungsten oxide(W2O6);Tungsten oxide (W3O9);Tungsten oxide (W4O12);Tungsten trioxide (WO3);Tungsten(VI) oxide;Tungstic anhydride;Tungsticoxide;Tungstic oxide (WO3);WWO 03PB;YMDS 06;

Tungsten trioxide Chemical Properties

IUPAC Name: Trioxotungsten
The MF of Trioxotungsten (1314-35-8) is O₃W.

The MW of Trioxotungsten (1314-35-8) is 231.84.
Synonyms of Trioxotungsten (1314-35-8): Tungsten trioxide ; Trioxotungsten ; Tungsten, trioxo- ; Tungsten oxide violet-blue ; Tungsten oxide yellow
Form: yellow to greenish-yellow powder
Product Categories: Inorganics
Density: 7.16 g/mL at 25 °C
Water Solubility: insoluble
Melting Point: 1473 °C
EINECS: 215-231-4
Form: powder
Merck: 14,9817

Tungsten trioxide Uses

Trioxotungsten (1314-35-8) is tungsten metal used as raw materials.Cemented carbide used in the system, pull tungsten wire, powder metallurgy, the system x-ray screen and fire protection fabrics. Ceramics can also be used as coloring agents and analytical reagents and so on.

Tungsten trioxide Production

MnWO₄FeWO₄+4NaOH→2Na₂WO₄+Fe(OH)₂Mn(OH)₂12Na₂WO₄+14HCl→5Na₂O₁₂WO₃+14NaCI+7H₂O
5Na₂O₁₂WO₃+10NH₄CI→5(NH₄)₂O₁₂WO₃+10NaCl
5(NH₄)₂O₁₂WO₃+10HCl+7H₂O→12H₂WO₄+10NH₄C1
H₂WO₄→WO₃+H₂O

Tungsten trioxide Toxicity Data With Reference

orl-rat LDLo:840 mg/kg

HYSAAV Hygiene and Sanitation: English Translation of Gigiena Sanitariya. 31 (1966),197.

Tungsten trioxide Consensus Reports

Reported in EPA TSCA Inventory.

Tungsten trioxide Safety Profile

Moderately toxic by ingestion. Can react violently with ClF₃, Li, Cl₂. See also TUNGSTEN COMPOUNDS.
Safety information of Trioxotungsten (1314-35-8):
Hazard Codes Xn
Risk Statements
22 Harmful if swallowed
36/37/38 Irritating to eyes, respiratory system and skin
Safety Statements
26 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
36/37/39 Wear suitable protective clothing, gloves and eye/face protection
RTECS YO7760000
F 21

Tungsten trioxide Standards and Recommendations

OSHA PEL: TWA 5 mg(W)/m³
ACGIH TLV: TWA 5 mg(W)/m³
NIOSH REL: TWA 5 mg(W)/m³

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