Tungsten(IV) oxide

  • Tungsten dioxide
Formula
O2W
Structure
Description
Dark yellow to brown monoclinic crystals

Registry Numbers and Inventories.
CAS
12036-22-5
EC (EINECS/ELINCS)
234-842-7
Beilstein/Gmelin
9352 (G)
Canada DSL/NDSL
NDSL
US TSCA
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
O2W
Formula mass
215.85
Melting point, °C
1500 - 1600
Decomposition point, °C
800
Density
12.1 g/cm3
Solubility in water
Insoluble

Hazards and Protection.
Storage
Keep tightly closed. Store in a cool dry place.
Protection
Compatible chemical-resistant gloves. Chemical safety goggles.
Respirators
Government approved respirator.
Small spills/leaks
Sweep up, place in a bag and hold for waste disposal. Avoid raising dust. Ventilate area and wash spill site after material pickup is complete.
Incompatibilities
Strong oxidizing agents.
Decomposition
Nature of decomposition products not known.

Fire.
Fire fighting
Extinguish using Water spray. Carbon dioxide, dry chemical powder, or appropriate foam. Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.
Hazards
Emits toxic fumes under fire conditions.

Health.
Exposure effects
Irritant. Irritating to respiratory system.
   Inhalation
Material is irritating to mucous membranes and upper respiratory tract.
   Skin
May cause skin irritation.
   Eyes
May cause eye irritation.

First aid
 
   Ingestion
If swallowed, wash out mouth with water provided person is conscious. Call a physician.
   Inhalation
If inhaled, remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen.
   Skin
In case of contact, immediately wash skin with soap and copious amounts of water.
   Eyes
In case of contact, immediately flush eyes with copious amounts of water for at least 15 minutes.

Transport.