Vanadium trioxide

  • Vanadic oxide
  • Vanadium sesquioxide
  • Divanadium trioxide
  • Vanadium(III) oxide
Formula
V2O3
Structure
Description
A black crystalline solid.
Uses
Used as a catalyst such as in making ethanol from ethylene.

Registry Numbers and Inventories.
CAS
1314-34-7
EC (EINECS/ELINCS)
215-230-9
RTECS
YW3050000
RTECS class
Mutagen; Primary Irritant
UN (DOT)
2860
Merck
12,10059
Beilstein/Gmelin
9560 (G)
Canada DSL/NDSL
NDSL
US TSCA
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
O3V2
Formula mass
149.88
Melting point, °C
1940
Density
4.87 g/cm3
Solubility in water
Insoluble
Heat of fusion
100.5 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry place. Store in a tightly closed container.
Handling
Wash thoroughly after handling. Use only in a well ventilated area. Avoid contact with skin and eyes. Avoid ingestion and inhalation. Use only in a chemical fume hood.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
May decompose on exposure to air.
Decomposition
Vanadium oxide (VOx) gases.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Substance is noncombustible. Extinguishing media: Use extinguishing media most appropriate for the surrounding fire.
Fire potential
Vanadium(iii) oxide ignites on heating in air.
Hazards
Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated.
Combustion products
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.

Health.
Exposure limit(s)
NIOSH REL: C 0.05 mg V/m3 15-min. Note: REL applies to all V cmpds except V metal and Vanadium carbide). {Vanadium fume}}NIOSH REL: C 0.05 mg V/m3 15-minute NIOSH IDLH: 35 mg/m3 (as V) {{V fume}} 35 mg/m3 (as V)
Exposure effects
CNS depression may occur, usually with fatal doses. Sensorimotor hemiparesis and aphasia developed shortly after ingestion of ammonium metavanadate. CNS manifestations include tremors, headaches, tinnitus, and changes in mental status.
   Ingestion
Causes gastrointestinal irritation with nausea, vomiting and diarrhea.
   Inhalation
Causes respiratory tract irritation.
   Skin
Causes skin irritation.
   Eyes
Causes eye irritation.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
2860
Response guide
Hazard class
6.1
Packing Group
III
 
Std. Transport #
4921298