Home Categories Organic Chemistry 1,2,4-Trichlorobenzene
A7660412

1,2,4-Trichlorobenzene , 99% , 120-82-1

Synonym(s):
1,2,4-TCB;1,2,4-Trichlorobenzene;acs solvents;high purity solvents

CAS NO.:120-82-1

Empirical Formula: C6H3Cl3

Molecular Weight: 181.45

MDL number: MFCD00000547

EINECS: 204-428-0

Update time: 2022-07-08

PRODUCT Properties

Melting point: 16 °C(lit.)
Boiling point: 214 °C(lit.)
Density  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.  2-8°C
solubility  water: insoluble
form  Liquid
color  Clear
Odor Characteristic aromatic odor
explosive limit 6.6%, 150°F
Water Solubility  INSOLUBLE
λmax 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
Merck  14,9631
BRN  956819
Henry's Law Constant 0.997 at 20.0 °C (wetted-wall column, ten Hulscher et al., 1992) 1.24, 2.27, 2.58, 3.06, and 3.90 at 2.0, 6.0, 10.0, 18.0, and 25.0 °C, respectively (EPICS-SPME, Dewulf et al., 1999)
Exposure limits NIOSH REL: TWA ceiling 5 ppm (40 mg/m3); ACGIH TLV: ceiling 5 ppm (adopted).
Dielectric constant 2.2400000000000002
Stability: Stable. Incompatible with strong oxidizing agents. Combustible.
LogP 4.28

Description and Uses

Trichlorobenzenes (TCBs) are synthetic chemicals that occur in three different isomeric forms. The three chlorinated cyclic aromatic isomers are 1,2,3-trichlorobenzene (1,2,3-TCB), 1,2,4-trichlorobenzene (1,2,4-TCB), and 1,3,5-trichlorobenzene (1,3,5-TCB). 1,2,4-TCB is one of the 188 chemicals designated as a hazardous air pollutant under the Clean Air Act.

1,2,4-Trichlorobenzene is used as a dielectric and heat transfer fluid in transformers. It acts as an intermediate, degreaser, wood preservative and solvent for dye. It is a high-temperature solvent used in gel permeation chromatography, especially for polyethylene and polypropylene. Further, it is used as a lubricant and as a synthetic transformer oil.

Safety

Symbol(GHS) 
GHS07,GHS09
Signal word  Warning
Hazard statements  H302-H315-H410
Precautionary statements  P264-P270-P273-P280-P301+P312-P302+P352
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
OEL Ceiling: 5 ppm (40 mg/m3)
WGK Germany  3
RTECS  DC2100000
Autoignition Temperature 571 °C
Hazard Note  Irritant
TSCA  Yes
HazardClass  6.1
PackingGroup  III
HS Code  29036990
Toxicity LD50 orally in Rabbit: 550 mg/kg LD50 dermal Rat 6139 mg/kg

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