Dichloroacetic acid

  • Bichloroacetic acid
  • Dichloroethanoic acid
  • DCA
Formula
Cl2CHCOOH
Structure
Description
Colorless to slightly yellow liquid with a pungent acidic odor.
Uses
Used as a chemical intermediate in the synthesis of dichlormid.

Registry Numbers and Inventories.
CAS
79-43-6
EC (EINECS/ELINCS)
201-207-0
EC Index Number
607-066-00-5
EC Class
Corrosive; Dangerous for the Environment
R 35 50
S 26 45 61
RTECS
AG6125000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Mutagen; Reproductive Effector; Primary Irritant
UN (DOT)
1764
Merck
13,3075
Beilstein/Gmelin
1098596
Beilstein Reference
4-02-00-00498
Swiss Giftliste 1
G-1530
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C2H2Cl2O2
Formula mass
128.94
Melting point, °C
-4
Boiling point, °C
194
Vapor pressure, mmHg
0.2 (25 C)
Vapor density (air=1)
4.4
Saturation Concentration
1882 ppm (0.19%) at 20 C (calculated)
Density
1.563 g/cm3 (20 C)
Solubility in water
Soluble
Viscosity
4.78 cp (35 C)
Refractive index
1.4667 (19 C)
pKa/pKb
1.26 (pKa)
Partition coefficient, pKow
0.92
Heat of vaporization
75.6 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry place. Store in a tightly closed container. Corrosives area. Do not store in metal containers.
D1B E
Handling
Wash thoroughly after handling. Wash hands before eating. Remove contaminated clothing and wash before reuse. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not ingest or inhale. Use with adequate ventilation. Discard contaminated shoes.
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
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Cover with sand, dry lime or soda ash and place in a closed container for disposal. Remove all sources of ignition. Provide ventilation. Do not get water inside containers.
Disposal code
4
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong acids, strong bases, strong oxidizing agents, strong reducing agents.
Decomposition
Hydrogen chloride, chlorine, phosgene, carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
75
Autoignition, °C
194
Upper exp. limit, %
43.3
Lower exp. limit, %
11.9
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. May polymerize explosively when involved in a fire. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. Extinguishing media: Substance is noncombustible; use agent most appropriate to extinguish surrounding fire. Do NOT get water inside containers. For small fires, use dry chemical, carbon dioxide, or water spray. For large fires, use dry chemical, carbon dioxide, alcohol-resistant foam, or water spray. Cool containers with flooding quantities of water until well after fire is out.
Fire potential
May burn but does not ignite readily.
Hazards
When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards. May polymerize explosively when heated or involved in a fire. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. Runoff may pollute waterways. Substance may be transported in a molten form.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
3
 
Flammability
1
 
 
Reactivity
0
 

Health.
Exposure limit(s)
OEL-RUSSIA:STEL4 mg/m3
Carcinogin
G-A3H, CP65
Poison_Class
4
Exposure effects
Repeated inhalation may cause chronic bronchitis. May cause cancer according to animal studies.
   Ingestion
May cause severe and permanent damage to the digestive tract. Causes gastrointestinal tract burns.
   Inhalation
May cause irritation of the respiratory tract with burning pain in the nose and throat, coughing, wheezing, shortness of breath and pulmonary edema. Causes chemical burns to the respiratory tract. Inhalation may be fatal as a result of spasm, inflammation, edema of the larynx and bronchi, chemical pneumonitis and pulmonary edema.
   Skin
Harmful if absorbed through the skin. Causes skin burns. Causes redness and pain.
   Eyes
Causes eye burns. May cause conjunctivitis. Causes redness and pain.

First aid
 
   Ingestion
Do NOT induce vomiting. 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. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Destroy contaminated shoes.
   Eyes
Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed. Extensive irrigation is required (at least 30 minutes).

Transport.
UN number
1764
Response guide
Hazard class
8
Packing Group
II
 
HS Code
2915 40 00
 
Std. Transport #
4931420