Ammonium metavanadate

  • Ammonium vanadate
  • Ammonium trioxovanadate
Formula
NH4VO3
Structure
Description
A white crystalline powder.
Uses
For catalyst as vanadium pentoxide, dyes, varnishes, indelible inks, drier for paints and inks, photography, analytical reagent.

Registry Numbers and Inventories.
CAS
7803-55-6
EC (EINECS/ELINCS)
232-261-3
RTECS
YW0875000
RTECS class
Mutagen; Reproductive Effector
UN (DOT)
2859
Merck
12,605
Beilstein/Gmelin
117084 (G)
RCRA
P119
Swiss Giftliste 1
G-4681
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
H4NO3V
Formula mass
116.98
Melting point, °C
200
Decomposition point, °C
200
Vapor pressure, mmHg
4
Vapor density (air=1)
4
Density
2.33 g/cm3 (20 C)
Solubility in water
6.2 g/L

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Do not store near combustible materials. Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Store protected from moisture.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Minimize dust generation and accumulation. Do not breathe dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not ingest or inhale. 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
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Use water spray to disperse the gas/vapor. Provide ventilation.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents, strong acids, moisture.
Decomposition
Oxides of nitrogen, irritating and toxic fumes and gases, vanadium oxide (VOx) gases, ammonia.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. This material in sufficient quantity and reduced particle size is capable of creating a dust explosion. Extinguishing media: Substance is noncombustible; use agent most appropriate to extinguish surrounding fire.
Fire potential
Not flammable.
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
3
 
Flammability
0
 
 
Reactivity
0
 

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)
Poison_Class
3
Exposure effects
Repeated exposure may cause sensitization dermatitis. Chronic exposure may cause a greenish tongue, metallic taste, cough, chronic bronchitis, and emphysema. Material is a potent enzyme inhibitor. Effects may be delayed. Laboratory experiments have resulted in mutagenic effects. May cause reproductive effects. May produce scattered allergy-like eczematous skin lesions symptomatic of vanadium toxicity.
   Ingestion
Harmful if swallowed. Causes gastrointestinal irritation with nausea, vomiting and diarrhea. Vanadium compounds can cause polycythemia, followed by red blood cell destruction, anemia, loss of appetite, pallor, and emaciation. May cause greenish-black tongue discoloration due to deposition of vanadium salts.
   Inhalation
May be fatal if inhaled. Causes upper respiratory tract irritation. Causes irritation of the mucous membrane. Inhalation may cause sore throat, shortness of breath, labored breathing, coughing, and pulmonary edema.
   Skin
Causes skin irritation.
   Eyes
Contact produces irritation, tearing, and burning pain. May cause conjunctivitis.

First aid
 
   Ingestion
Induce vomiting. 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 breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
   Skin
Get medical aid. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
2859
Response guide
Hazard class
6.1
Packing Group
II
 
USCG CHRIS Code
AMV
 
Std. Transport #
4923203