1,2,4-Trichlorobenzene

  • unsym-Trichlorobenzene
  • 1,2,4-Trichlorobenzol
Formula
C6H3Cl3
Structure
Description
Colorless liquid or crystalline solid with an aromatic odor.
Uses
Solvent in chemical manufacturing, dyes & intermediates, dielectric fluid, synthetic transformer oils, lubricants, heat-transfer medium, insecticides.

Registry Numbers and Inventories.
CAS
120-82-1
EC (EINECS/ELINCS)
204-428-0
EC Index Number
602-087-00-6
EC Class
Harmful; Irritant; Dangerous for the Environment
R 22 38 50/53
S 23 37/39 60 61
RTECS
DC2100000
RTECS class
Tumorigen; Mutagen; Reproductive Effector; Primary Irritant
UN (DOT)
2321
Merck
12,9760
Beilstein/Gmelin
956819
Beilstein Reference
4-05-00-00664
EPA OPP
81101
Swiss Giftliste 1
G-5304
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C6H3Cl3
Formula mass
181.45
Melting point, °C
17
Boiling point, °C
214.4
Vapor pressure, mmHg
0.5
Vapor density (air=1)
6.26
Saturation Concentration
1316 ppm (0.1%) at 20 C (calculated)
Odor Threshold Odor threshold 3 ppm
Critical temperature
453.3
Critical pressure
36.7
Density
1.4827 g/cm3 (0 C)
Solubility in water
30 mg/L
Viscosity
32.90 cp (0 C)
Surface tension
39.1 g/s2 (20 C)
Refractive index
1.572 (20 C)
Partition coefficient, pKow
4.02
Heat of vaporization
54.68 kJ/mol
Heat of combustion
-2798 kJ/mol

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes. 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 minimize contact with skin.
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
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Scoop up with a nonsparking tool, then place into a suitable container for disposal. Remove all sources of ignition. Provide ventilation. Do not get water inside containers.
Disposal code
2
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Hydrogen chloride, phosgene, carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
99
Autoignition, °C
571
Upper exp. limit, %
6.6
Lower exp. limit, %
2.5
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Will burn if involved in a fire. Use water spray to keep fire-exposed containers cool. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. Combustible material; may burn but does not ignite readily. Extinguishing media: For small fires, use dry chemical, carbon dioxide, halon, or water spray. Do NOT get water inside containers. 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
Nonflammable but gives off combustible fumes.
Hazards
When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards.
Combustion products
May contain toxic hydrogen chloride and phosgene.
Health
2
 
Flammability
1
 
 
Reactivity
0
 

Health.
Exposure limit(s)
NIOSH REL: C 5 ppm (40 mg/m3)
Poison_Class
4
Exposure effects
Prolonged or repeated skin contact may cause dermatitis. May cause liver and kidney damage.
   Ingestion
Harmful if swallowed. May cause gastrointestinal irritation with nausea, vomiting and diarrhea. May cause a narcotic effect with possible coma. May cause central nervous system depression.
   Inhalation
May cause respiratory tract irritation.
   Skin
Causes skin irritation. May cause dermatitis.
   Eyes
May cause severe eye irritation.

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.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   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 immediately.

Transport.
UN number
2321
Response guide
Hazard class
6.1
Packing Group
III
 
USCG CHRIS Code
TCB
 
36 Halogenated hydrocarbons
HS Code
2903 69 90
 
IMO Chemical Code
17
IMO Pollution Category
B
IMO Hazard code
S/P