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6131-99-3

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Identification

Name
Sodium cacodylate trihydrate
CAS
6131-99-3
Synonyms
CACODYLIC ACID NA-SALT 3H2O
CACODYLIC ACID, SODIUM SALT
CACODYLIC ACID SODIUM SALT HYDRATE
CACODYLIC ACID SODIUM SALT TRIHYDRATE
DIMETHYLARSENIC ACID SODIUM SALT HYDRATE
DIMETHYLARSINIC ACID SODIUM SALT
DIMETHYLARSINIC ACID SODIUM SALT TRIHYDRATE
HYDROXYDIMETHYLARSINE OXIDE SODIUM SALT TRIHYDRATE
KACODYLIC ACID SODIUM SALT TRIHYDRATE
SODIUM CACODYLATE
SODIUM CACODYLATE 3H2O
SODIUM CACODYLATE TRIHYDRATE
SODIUM DIMETHYL ARSENATE, TRIHYDRATE
Arsineoxide,hydroxydimethyl-,sodiumsalt,trihydrate
Dimethylarsenicacidsodiumsalttrihydrate
Sodiumdimethylarsinicacidtrihydrate
Dimethylarsonic acid sodium salt
CACODYLIC ACID SODIUM CRYST
CACODYLIC ACID SODIUM SIGMAULTRA
CacodylicAcid,SodiumSaltTrihydrate98%
EINECS(EC#)
204-708-2
Molecular Formula
C2H12AsNaO5
MDL Number
MFCD00149079
Molecular Weight
214.03
MOL File
6131-99-3.mol

Chemical Properties

Appearance
Sodium cacodylate is a white crystalline solid which occurs as the trihydrate. It liquefies in the water of hydration @ 60°C and becomes anhydrous @ 120°C.
Appearance
white crystalline powder or crystals
mp 
77-80 °C
solubility 
H2O: 0.5 M at 20 °C, clear, colorless

Merck 
14,8595
BRN 
3702348
CAS DataBase Reference
6131-99-3(CAS DataBase Reference)

Safety Data

Hazard Codes 
T,N
Risk Statements 
R23/25:Toxic by inhalation and if swallowed .
R50/53:Very Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment .
Safety Statements 
S20/21:When using, do not eat, drink or smoke .
S28:After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer) .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S60:This material and/or its container must be disposed of as hazardous waste .
S61:Avoid release to the environment. Refer to special instructions safety data sheet .
RIDADR 
UN 1688 6.1/PG 2

WGK Germany 
3

RTECS 
CH7890000


3
HazardClass 
6.1
PackingGroup 
II
HS Code 
29319090

Hazard Information

Potential Exposure
This material has been used as a nonselective herbicide and for general weed control.
First aid
If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give a slurry of activated charcoal in water to drink and induce vomiting. Do not make an unconscious person vomit. Obtain authorization and/or further instructions from the local hospital for administration of an antidote or performance of other invasive procedures. Rush to health care facility.
Shipping
UN1688 Sodium cacodylate Hazard Class: 6.1; Labels: 6.1-Poisonous materials. UN3465 Organoarsenic compound, solid, n.o.s., Hazard Class: 6.1; Labels: 6.1Poisonous materials, Technical Name Required
Incompatibilities
Incompatible with oxidizers, strong bases; acids, active metals (iron, aluminum, zinc). Contact with acids react to form highly toxic dimethylarsine gas. Attacks some metals.
Waste Disposal
For cacodylic acid, precipitate as calcium arsenate and calcium arsenite by treatment with excess lime water. Recycle if possible. If not, put in secure storage for possible disposal in leach-proof dumps. In accordance with 40CFR165, follow recommendations for the disposal of pesticides and pesticide containers. Must be disposed properly by following package label directions or by contacting your local or federal environmental control agency, or by contacting your regional EPA office.

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