Trichloroacetic acid, solution

  • TCA
  • Trichloroethanoic acid
  • Amchem Grass Killer
  • Aceto-Caustin
Formula
CCl3COOH
Structure
Description
Colorless to slightly yellow crystals with a sharp, pungent odor, deliquescent.
Uses
Herbicide.

Registry Numbers and Inventories.
CAS
76-03-9
EC (EINECS/ELINCS)
200-927-2
EC Index Number
607-004-00-7
EC Class
Corrosive; Dangerous for the Environment
R 35 50/53
S 26 36/37/39 45 60 61
RTECS
AJ7875000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Drug; Mutagen; Reproductive Effector; Primary Irritant
UN (DOT)
1839
Merck
12,9756
Beilstein/Gmelin
970119
Beilstein Reference
4-02-00-00508
EPA OPP
81002
Swiss Giftliste 1
G-2990
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C2HCl3O2
Formula mass
163.39
Melting point, °C
54 - 56
Boiling point, °C
196
Vapor pressure, mmHg
0.17 (25 C)
Vapor density (air=1)
5.6
Saturation Concentration
Low; 1300 ppm (0.13%) at 51 C (calculated)
Density
1.62 g/cm3 (25 C)
Solubility in water
Miscible
Viscosity
6.83 cp (25 C)
Surface tension
27.8 g/s2 @ 80.2 C
Refractive index
1.4775 (20 C)
pKa/pKb
1.10 (pKa)
Partition coefficient, pKow
1.33
Heat of vaporization
47.7 kJ/mol
Heat of combustion
-389 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. Corrosives area. Keep away from strong bases.
D1B E
Handling
Wash thoroughly after handling. Use only in a well ventilated area. Minimize dust generation and accumulation. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not ingest or inhale. Use only in a chemical fume hood. Wash clothing before reuse.
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
Clean up spills immediately, using the appropriate protective equipment. Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions. Neutralize spill with sodium bicarbonate. Provide ventilation.
Disposal code
4
Stability
Stable at room temperature in closed containers under normal storage and handling conditions.
Incompatibilities
Reacts dangerously with bases, strong oxidizers, and alkali metals such sodium, potassium, and calcium.
Decomposition
Hydrogen chloride, irritating and toxic fumes and gases, chlorine, phosgene gas, chloroform.

Fire.
Flash Point,°C
66
Fire fighting
Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Use water in flooding quantities as fog. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible.
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
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
NIOSH REL: TWA 1 ppm (7 mg/m3)
Poison_Class
2
Exposure effects
Abnormal neuropsychologic function has been reported following hydrochloric acid exposure from a leaking tanker truck.
   Ingestion
Harmful if swallowed. May cause severe and permanent damage to the digestive tract. Causes gastrointestinal tract burns.
   Inhalation
Causes severe irritation of upper respiratory tract with coughing, burns, breathing difficulty, and possible coma.
   Skin
Causes skin burns.
   Eyes
Causes severe eye burns.

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 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
1839
Response guide
Hazard class
8
Packing Group
II
 
HS Code
2915 40 00
 
Std. Transport #
4931471