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1,2,4-Trichlorobenzene structure
Chemical Name:
ai3-07775;1.2.4-Tric;Hipochem GM;hostetexl-pec;Hostetex l-pec;Trojchlorobenzen;as-trichlorobenzene;1,2,4-Trichlorobenze;1,2,4-Trichlorbenzol;1,2,4-Trichlorbenzene
Molecular Formula:
Formula Weight:
MOL File:

1,2,4-Trichlorobenzene Properties

Melting point:
16 °C(lit.)
Boiling point:
214 °C(lit.)
1.454 g/mL at 25 °C(lit.)
vapor density 
>6 (vs air)
vapor pressure 
1 mm Hg ( 40 °C)
refractive index 
n20/D 1.571(lit.)
Flash point:
>230 °F
storage temp. 
water: insoluble
explosive limit
6.6%, 150°F
Water Solubility 
λ: 308 nm Amax: 1.00
λ: 310 nm Amax: 0.50
λ: 350 nm Amax: 0.05
λ: 375-400 nm Amax: 0.01
Stable. Incompatible with strong oxidizing agents. Combustible.
CAS DataBase Reference
120-82-1(CAS DataBase Reference)
NIST Chemistry Reference
Benzene, 1,2,4-trichloro-(120-82-1)
EPA Substance Registry System
Benzene, 1,2,4-trichloro-(120-82-1)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
  • NFPA
Hazard Codes  Xn,N,Xi,T,F
Risk Statements  22-38-50/53-52/53-39/23/24/25-23/24/25-11-51/53
Safety Statements  23-37/39-60-61-45-36/37-16-7
RIDADR  UN 2321 6.1/PG 3
WGK Germany  3
RTECS  DC2100000
Autoignition Temperature 571 °C
Hazard Note  Irritant
HazardClass  6.1
PackingGroup  III
HS Code  29036990
Hazardous Substances Data 120-82-1(Hazardous Substances Data)
Toxicity LD50 orally in Rabbit: 550 mg/kg LD50 dermal Rat 6139 mg/kg
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H225 Highly Flammable liquid and vapour Flammable liquids Category 2 Danger P210,P233, P240, P241, P242, P243,P280, P303+ P361+P353, P370+P378,P403+P235, P501
H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H370 Causes damage to organs Specific target organ toxicity, single exposure Category 1 Danger P260, P264, P270, P307+P311, P321,P405, P501
H400 Very toxic to aquatic life Hazardous to the aquatic environment, acute hazard Category 1 Warning P273, P391, P501
H410 Very toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 1 Warning P273, P391, P501
H411 Toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 2
Precautionary statements:
P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P264 Wash hands thoroughly after handling.
P264 Wash skin thouroughly after handling.
P273 Avoid release to the environment.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P311 Call a POISON CENTER or doctor/physician.
P321 Specific treatment (see … on this label).
P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.
P332+P313 IF SKIN irritation occurs: Get medical advice/attention.
P501 Dispose of contents/container to..…

NFPA 704

Diamond Hazard Value Description
Flammability   1 Materials that require considerable preheating, under all ambient temperature conditions, before ignition and combustion can occur. Includes some finely divided suspended solids that do not require heating before ignition can occur. Flash point at or above 93.3 °C (200 °F). (e.g. mineral oil, ammonia)
Instability   0 Normally stable, even under fire exposure conditions, and is not reactive with water (e.g. helium,N2)

(NFPA, 2010)

1,2,4-Trichlorobenzene price More Price(23)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 132047 1,2,4-Trichlorobenzene ReagentPlus , ≥99% 120-82-1 1l $112 2018-11-13 Buy
Sigma-Aldrich 132047 1,2,4-Trichlorobenzene ReagentPlus , ≥99% 120-82-1 4l $288 2018-11-13 Buy
Alfa Aesar 019390 1,2,4-Trichlorobenzene, Spectrophotometric Grade, 99% min 120-82-1 1L $66.4 2018-11-16 Buy
Alfa Aesar 019390 1,2,4-Trichlorobenzene, Spectrophotometric Grade, 99% min 120-82-1 4L $237 2018-11-16 Buy
Sigma-Aldrich 256412 1,2,4-Trichlorobenzene for HPLC, ≥99% 120-82-1 2l $258 2018-11-13 Buy

1,2,4-Trichlorobenzene Chemical Properties,Uses,Production

Chemical Properties

Colorless, stable liquid; odor similar to that of o-dichlorobenzene. Miscible with most organic solvents and oils; insoluble in water. Combustible.

Chemical Properties

1,2,4-Trichlorobenzene is a low-melting solid or liquid with a pleasant, aromatic odor. The Odor Threshold is 1.4 ppm.


1,2,4-Trichlorobenzene is a solvent in various organic chemical reactions.


ChEBI: A trichlorobenzene with chloro substituents at positions 1, 2 and 4.

General Description

Colorless liquid or white solid with a sharp chlorobenzene odor. Melting point 16.95°C (62.5°F) .

Reactivity Profile

1,2,4-Trichlorobenzene can react vigorously with oxidizing materials . Yields hydrogen chloride and phosgene when heated to decomposition [USCG, 1999].

Health Hazard

Exposures to high concentrations via inhalation are potentially hazardous to the lungs, kidneys and liver. Prolonged or repeated exposures or short exposure to high concentrations via inhalation are potentially hazardous to the lungs, kidneys and liver. Prolonged or repeated exposure to the eyes is likely to result in moderate pain and transient irritation. Prolonged or repeated contact with the skin may result in moderate irritation and possible systemic effects. Ingestion: May cause kidney and liver damage.

Safety Profile

Poison by ingestion. Moderately toxic by intraperitoneal route. An experimental teratogen. Experimental reproductive effects. Mutation data reported. A slan irritant. Combustible when exposed to heat or flame. Can react vigorously with oxidizing materials. To fight fire, use water, foam, CO2, dry chemical. When heated to decomposition it emits toxic fumes of Cl-. See also CHLORINATED HYDROCARBONS, AROMATIC.

Potential Exposure

1,2,4-Trichlorobenzene is used as a dye carrier, herbicide intermediate; a heat transfer medium; a dielectric fluid in transformers; a degreaser; a lubricant; as an industrial chemical; solvent, emulsifier, and as a potential insecticide against termites. The other trichlorobenzene isomers are not used in any quantity.

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 large quantities of water. Do not make an unconscious person vomit.


UN2321 Trichlorobenzenes, liquid, Hazard Class: 6.1; Labels: 6.1-Poisonous materials.

Purification Methods

Separate it from a mixture of isomers by washing with fuming H2SO4, then water, drying with CaSO4 and slowly fractionally distilling. [Jensen et al. J Am Chem Soc 81 3303 1959, Beilstein 5 IV 664.]


Reacts violently with oxidants, acids, acid fumes; steam.

Waste Disposal

Incineration, preferably after mixing with another combustible fuel. Care must be exercised to assure complete combustion to prevent the formation of phosgene. An acid scrubber is necessary to remove the halo acids produced.

1,2,4-Trichlorobenzene Preparation Products And Raw materials

Raw materials

Preparation Products

1,2,4-Trichlorobenzene Suppliers

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1,2,4-Trichlorobenzene Spectrum

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