Sodium cacodylate trihydrate

  • Dimethylarsenic acid sodium salt trihydrate
  • Arsine oxide, hydroxydimethyl, sodium salt, trihydrate
Formula
C2H6AsNaO2.3H2O
Structure
Description
White solid. Weak odor.

Registry Numbers and Inventories.
CAS
6131-99-3
EC (EINECS/ELINCS)
204-708-2
EC Index Number
033-002-00-5
EC Class
toxic, dangerous for the environment
R 23/25 50/53
S 20/21 28.1 45 60 61
RTECS
CH7890000
RTECS class
Reproductive Effector
UN (DOT)
1688
Beilstein/Gmelin
3749025
Beilstein Reference
3-04-00-01818
New Zealand
Listed

Properties.
Formula
C2H6AsNaO2 . 3H2O
Formula mass
214.05
Melting point, °C
60
Vapor density (air=1)
7.4
Density
>1 g/cm3 (20C)
Solubility in water
2000 g/L (20 C)

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 only in a well ventilated area. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation.
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
Vacuum or sweep up material and place into a suitable disposal container. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions.
Disposal code
9
Stability
Stable under normal shipping and handling conditions.
Incompatibilities
Strong oxidizing agents and strong acids.
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. Extinguishing media: For small fires, use water spray, dry chemical, carbon dioxide or chemical foam.
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.
Exposure effects
Chronic exposure to arsenical dust may cause breath shortness, nausea, chest pains, and garlic odor.
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea. May cause kidney damage.
   Inhalation
May cause respiratory tract irritation.
   Skin
May cause skin irritation.
   Eyes
May cause eye irritation.

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
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid if cough or other symptoms appear.
   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. Wash clothing before reuse.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
1688
Response guide
Hazard class
6.1
Packing Group
II
 
HS Code
2931 00 95