Oxophenylarsine

  • Phenylarsine oxide
  • Arsenosobenzene
Formula
C6H5AsO
Structure
Description
Off-white solid.
Uses
The material is used as a pesticide.

Registry Numbers and Inventories.
CAS
637-03-6
EC (EINECS/ELINCS)
211-275-3
RTECS
CH8100000
RTECS class
Organometallic
UN (DOT)
1557
Merck
12,7083
Beilstein/Gmelin
2935227
Beilstein Reference
4-16-00-01160
EPA OPP
7101
Swiss Giftliste 1
G-5515
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
Korea ECL
Listed

Properties.
Formula
C6H5AsO
Formula mass
168.02
Melting point, °C
154 - 156

Hazards and Protection.
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling
Wash thoroughly after handling. Use with adequate ventilation. Minimize dust generation and accumulation. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. 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 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
Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions. Provide ventilation.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Carbon monoxide, carbon dioxide, oxides of arsenic.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. This material in sufficient quantity and reduced particle size is capable of creating a dust explosion. Extinguishing media: Use water spray, dry chemical, or carbon dioxide.
Fire potential
Combustible material: may burn but does not ignite readily.
Hazards
Containers may explode when heated.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
3
 
Flammability
0
 
 
Reactivity
0
 

Health.
Poison_Class
1
Exposure effects
Chronic ingestion is characterized by weakness, anorexia, gastrointestinal disturbances, impairment of cognitive function, peripheral neuropathy, and skin disorders. Reynaud's phenomenon has been reported in association with long-term exposure.
   Ingestion
May be fatal if swallowed. May cause irritation of the digestive tract. May cause liver damage. May cause central nervous system effects. Ingestion of arsenical compounds has resulted in the following symptoms: burning of the lips, constriction of the throat, and dysphagia followed by excrutiating abdominal pain, severe nausea, projectile vomiting, and profuse diarrhea. Other toxic effects on the liver, the blood-forming organs, the central and peripheral nervous systems and the cardiovascular system may appear. Convulsions, coma, and death may follow within 24 hours in severe cases.
   Inhalation
May cause respiratory tract irritation. May cause systemic effects.
   Skin
Causes skin burns.
   Eyes
Causes eye burns.

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. Do NOT allow victim to rub or keep eyes closed.

Transport.
UN number
1557
Response guide
Hazard class
6.1
Packing Group
I; II; III