Vanadium pentoxide

  • Vanadic anhydride
  • Vanadium(V) oxide
  • Divanadium pentoxide
Formula
V2O5
Structure
Description
A yellow to red crystalline powder.
Uses
Chemical intermediate, principally a chemical intermediate for vanadium alloys & compounds, oxidation catalyst in many industrial synthesis processes, catalyst in manufacture of sulfuric acid (contact process), oxidation catalyst in automobile catalytic converters, additive to glass for screening uv radiation.

Registry Numbers and Inventories.
CAS
1314-62-1
EC (EINECS/ELINCS)
215-239-8
EC Index Number
023-001-00-8
EC Class
Mutagenic Category 3; Toxic for reproduction Category 3; Toxic; Harmful; Irritant; Dangerous for the Environment
R 20/22 37 40 48/23 51/53 63
S 36/37 38 45 61
RTECS
YW2460000
RTECS class
Tumorigen
UN (DOT)
2862
Merck
12,10056
Beilstein/Gmelin
544168 (G)
RCRA
P120
Swiss Giftliste 1
G-3044
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
O5V2
Formula mass
181.88
Melting point, °C
690
Boiling point, °C
1750
Density
3.35 g/cm3
Solubility in water
8 g/L
Heat of fusion
97.1 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling
Wash thoroughly after handling. Wash hands before eating. Do not get in eyes, on skin, or on clothing. Do not ingest or inhale.
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 and clothing to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.
Respirators
Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece airline respirator in the positive pressure mode with emergency escape provisions.
Small spills/leaks
Sweep up, then place into a suitable container for disposal.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong acids.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Extinguishing media: Substance is noncombustible; use agent most appropriate to extinguish surrounding fire.
Fire potential
Moderately flammable.
Hazards
Container may explode in heat of fire. When heated to decomposition, it emits acrid smoke and fumes of vanadium oxides. Material is not flammable but it may increase the intensity of the fire when in contact with combustible materials. Avoid chlorine trifluoride; lithium; peroxyformic acid; and calcium, sulfur, water complexes.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
3
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
TLV (respirable dust or fume, as V2O5): 0.05 mg/m3 A4 (TWA) (ACGIH 1996). MAK: 0.05 mg/m3; (1996).
Poison_Class
2
Exposure effects
Neurologic disorders, including nervous depression, psychiatric disturbances, and tremors have been seen in connection with exposure to vanadium pentoxide. Vanadium pentoxide has been shown to be teratogenic in the hamster and mouse.
   Ingestion
May be fatal if swallowed. May cause central nervous system effects. Symptoms include excess salivation, vomiting and diarrhea. High concentrations may cause drowsiness, convulsions, unconsciousness and central nervous system damage.
   Inhalation
May cause respiratory tract irritation. May cause effects similar to those described for ingestion. May cause lung damage. May cause asthma and shortness of breath.
   Skin
May cause skin irritation. May cause skin sensitization, an allergic reaction, which becomes evident upon re-exposure to this material.
   Eyes
May cause eye irritation. May cause conjunctivitis.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   Skin
Get medical aid immediately. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
2862
Response guide
Hazard class
6.1
Packing Group
III
 
USCG CHRIS Code
VNO
 
Std. Transport #
4923457