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
CAS DataBase Reference 120-82-1(CAS DataBase Reference)
NIST Chemistry Reference Benzene, 1,2,4-trichloro-(120-82-1)
EPA Substance Registry System 1,2,4-Trichlorobenzene (120-82-1)

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
OEL Ceiling: 5 ppm (40 mg/m3)
RIDADR  UN 2321 6.1/PG 3
WGK Germany  3
RTECS  DC2100000
Autoignition Temperature 571 °C
Hazard Note  Irritant
TSCA  Yes
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

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