Arsenic pentoxide

  • Arsenic acid anhydride
  • Diarsenic pentaoxide
  • Arsenic(V) oxide
  • Arsenic anhydride
  • Arsenic pentaoxide
Formula
As2O5
Description
A white crystalline solid.
Uses
Rodenticide, acaricide.

Registry Numbers and Inventories.
CAS
1303-28-2
EC (EINECS/ELINCS)
215-116-9
EC Index Number
033-004-00-6
EC Class
Carcinogenic Category 1; Toxic; Dangerous for the Environment
RTECS
CG2275000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Mutagen; Reproductive Effector
UN (DOT)
1559
Merck
12,839
Beilstein/Gmelin
17093 (G)
RCRA
P011
EPA OPP
6802
Swiss Giftliste 1
G-6980
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
As2O5
Formula mass
229.84
Melting point, °C
730
Odor Threshold Odor threshold Odorless.
Density
4.09 g/cm3 (25 C)
Solubility in water
658 g/L

Hazards and Protection.
Storage
Poison room locked.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Do not get on skin or in eyes. 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 and clothing 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
Sweep up, then place into a suitable container for disposal.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Heat, acids, oxidizing agents, halogens, moist air or water.
Decomposition
Oxides of arsenic.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Extinguishing media: Use water spray to cool fire-exposed containers.
Fire potential
Arsenic pentoxide itself does not burn or burns with difficulty.
Hazards
Fire may produce irritating or poisonous gases. Reacts with metal and may give off toxic arsine gas. Hazardous polymerization may not occur.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
3
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
TLV (as As): ppm; 0.01 mg/m3 A1 (ACGIH 1997). MAK: class III A1 (1997).
Carcinogin
O, G-A1, I-1, N-1, CP65
Poison_Class
1
Exposure effects
Chronic ingestion is characterized by weakness, anorexia, gastrointestinal disturbances, impairment of cognitive function, peripheral neuropathy, and skin disorders. Chronic exposure may cause liver damage. Chronic ingestion may cause fetal effects.
   Ingestion
May cause liver damage. May cause severe digestive tract irritation with abdominal pain, nausea, vomiting and diarrhea. Can cause nervous system damage. May cause bone marrow depression.
   Inhalation
Causes respiratory tract irritation. May cause effects similar to those described for ingestion.
   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 result in corneal injury.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately. Induce vomiting by giving one teaspoon of Syrup of Ipecac.
   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
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists.
   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
1559
Response guide
Hazard class
6.1
Packing Group
II
 
USCG CHRIS Code
APO
 
Std. Transport #
4923112