Benzene arsonic acid

  • Phenylarsonic acid
Formula
C6H5AsO(OH)2
Structure
Description
Colorless solid.
Uses
Reagent for tin.

Registry Numbers and Inventories.
CAS
98-05-5
EC (EINECS/ELINCS)
202-631-9
RTECS
CY3150000
RTECS class
Agricultural Chemical and Pesticide; Drug
UN (DOT)
1557
Merck
12,1095
Beilstein/Gmelin
2935741
Beilstein Reference
4-16-00-01183
RCRA
D004
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Formula
C6H7AsO3
Formula mass
202.04
Density
1.76 g/cm3
Solubility in water
Slightly soluble.
pKa/pKb
8.48 (pKa)
Partition coefficient, pKow
0.06

Hazards and Protection.
Storage
Store in a cool, dry place. Keep container closed when not in use.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation. Use with adequate ventilation.
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 minimize contact with skin.
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
Clean up spills immediately, using the appropriate protective equipment.
Stability
Stable under normal temperatures and pressures.
Decomposition
Irritating and toxic fumes and gases.

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. Extinguishing media: Use agent most appropriate to extinguish fire.
Fire potential
Combustible material: may burn but does not ignite readily.
Hazards
Benzenearsonic acid emits poisonous fumes of arsenic when heated to decomposition.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure limit(s)
OSHA PEL: 1910.1018 TWA 0.010 mg/m3 NIOSH REL: Ca C 0.002 mg/m3 15-minute See Appendix A NIOSH IDLH: Potential occupational carcinogen 5 mg/m3 (as As)
Exposure effects
Abnormally low blood pressure and respiratory failure may occur with poisoning from other arsenic compounds. Exposed animals may develop peripheral neuropathies.
   Ingestion
Low hazard for usual industrial handling.
   Inhalation
Low hazard for usual industrial handling.
   Skin
No information regarding skin irritation and other potential effects was found.
   Eyes
No information regarding eye irritation and other potential effects was found.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. 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 if irritation develops or persists. Flush skin with plenty of soap and water.
   Eyes
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
1557
Response guide
Hazard class
6.1
Packing Group
I; II; III
 
USCG CHRIS Code
BAA