Chloroacetic acid, molten

  • MCA
  • Monochloroacetic acid
  • Chloroethanoic acid
  • MCA
Formula
ClCH2COOH
Structure
Description
Colorless solution, odor of vinegar.
Uses
Chemical intermediate for pharmaceuticals such as Vitamin A, herbicide.

Registry Numbers and Inventories.
CAS
79-11-8
EC (EINECS/ELINCS)
201-178-4
EC Index Number
607-003-00-1
EC Class
Toxic; Corrosive; Dangerous for the Environment
R 25 34 50
S 22 37 45 61
RTECS
AF8575000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Mutagen
UN (DOT)
1750
Merck
13,2129
Beilstein/Gmelin
605438
Beilstein Reference
4-02-00-00474
RCRA
P023
EPA OPP
279400
Swiss Giftliste 1
G-1403
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C2H3ClO2
Formula mass
94.50
Melting point, °C
62
Boiling point, °C
188
Vapor pressure, mmHg
0.26 (25 C)
Vapor density (air=1)
3.26
Saturation Concentration
1000 ppm (0.1%) at 20 C (calculated)
Evaporization number
1 (butyl acetate=1)
Odor Threshold Odor threshold 0.15 mg/m3
Critical temperature
413
Critical pressure
57.0
Density
1.4043 g/cm3 (20 C)
Solubility in water
Very soluble
Viscosity
2.23 cp (65 C)
Surface tension
35.17 g/s2 at 100 C
Refractive index
1.4351 (55 C)
pKa/pKb
2.87 (pKa)
Partition coefficient, pKow
0.22
Heat of fusion
16.3 kJ/mol
Heat of vaporization
46.9 kJ/mol
Heat of combustion
-716 kJ/mol

Hazards and Protection.
Storage
Store in a tightly closed container. Keep from contact with oxidizing materials. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep away from metals. Keep away from reducing agents. Do not store in metal containers. Do not store near alkaline substances.
D1A D2B E
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Minimize dust generation and accumulation. Keep container tightly closed. Do not get on skin or in eyes. Do not ingest or inhale. 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 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
Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Remove all sources of ignition. Provide ventilation. Do not get water inside containers. Cover with dry earth, dry sand, or other non-combustible material followed with plastic sheet to minimize spreading and contact with water.
Disposal code
9
Stability
Stable at room temperature in closed containers under normal storage and handling conditions.
Incompatibilities
Strong oxidizers, amines, alcohols, reducing agents, metals, and alkali.
Decomposition
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
72
Autoignition, °C
460
Lower exp. limit, %
8
Fire fighting
This material is extremely hazardous to health, but fire fighters may enter areas with extreme care. Full protective clothing including a self-contained breathing apparatus, coat, pants, gloves, boots and bands around legs, arms and waist should be provided. No skin surface should be exposed. Cool fire-exposed containers with water. Move container from fire area if you can do so without risk. Spray cooling water on containers that are exposed to flames until well after fire is out.Water fog applied gently to surface will cause frothing which will extinguish fire. Normal fire fighting procedures may be used. Extinguish fire using agent suitable for surroundings. Material itself does not burn or burns with difficulty. For small fires use dry chemical, carbon dioxide, water spray or foam. For large fires use water spray, fog, or foam.
Fire potential
May burn but does not ignite readily.
Hazards
When heated to decomposition, it emits highly toxic fumes of phosgene and chlorides. Water may cause frothing if it gets below surface of the liquid and turns to steam. Flammable/poisonous gases may accumulate in tanks and hopper cars. Some of these materials may ignite combustibles, e.g., wood, paper, oil. It is corrosive to metals. Avoid heating.
Combustion products
Toxic gases, such as hydrogen chloride, phosgene and carbon monoxide, may be generated.
Health
4
 
Flammability
1
 
 
Reactivity
0
 

Health.
Exposure limit(s)
PDK: 1 mg/m3 (USSR 1993).
Poison_Class
3
Exposure effects
May cause liver and kidney damage.
   Ingestion
May cause perforation of the digestive tract. Causes severe digestive tract burns with abdominal pain, vomiting, and possible death. May cause corrosion and permanent tissue destruction of the esophagus and digestive tract. May be harmful if swallowed.
   Inhalation
Inhalation of high concentrations may cause central nervous system effects characterized by headache, dizziness, unconsciousness and coma. May cause liver and kidney damage. Causes severe irritation of upper respiratory tract with coughing, burns, breathing difficulty, and possible coma. May cause pulmonary edema and severe respiratory disturbances. May cause kidney damage.
   Skin
Contact with liquid is corrosive and causes severe burns and ulceration.
   Eyes
May cause irreversible eye injury. Contact with liquid is corrosive to the eyes and causes severe burns.

First aid
 
   Ingestion
Never give anything by mouth to an unconscious person. Get medical aid immediately. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. 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
1750
Response guide
Hazard class
8
USCG CHRIS Code
MCA
 
HS Code
2915 40 00
 
Std. Transport #
4923116
 
IMO Pollution Category
C
IMO Hazard code
S/P