NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

1,2,4-Trichlorobenzene

CAS
120-82-1

C6H3Cl3

RTECS
DC2100000
Synonyms & Trade Names

unsym-Trichlorobenzene; 1,2,4-Trichlorobenzol
DOT ID & Guide
2321 / 153 (liquid)

Exposure
Limits

NIOSH REL: C 5 ppm (40 mg/m3)
OSHA PEL: none
IDLH
N.D. See: IDLH INDEX
Conversion
1 ppm = 7.42 mg/m3
Physical Description
Colorless liquid or crystalline solid (below 63°F) with an aromatic odor.
MW: 181.4
BP: 416°F
FRZ: 63°F
Sol: 0.003%
VP: 1 mmHg
IP: ?

Sp.Gr: 1.45
Fl.P: 222°F
UEL(302°F): 6.6%
LEL(302°F): 2.5%

Class IIIB Combustible Liquid
Combustible Solid
Incompatibilities & Reactivities

Acids, acid fumes, oxidizers, steam
Measurement Methods
NIOSH 5517
See: NMAM or OSHA Methods
Personal Protection & Sanitation
(See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: No recommendation

First Aid
(See procedures)
Eye: Irrigate immediately
Skin: Soap wash
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations
Not available.
Important additional information about respirator selection
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
Irritation eyes, skin, mucous membrane; in animals: liver, kidney damage; possible teratogenic effects
Target Organs
Eyes, skin, respiratory system, liver, reproductive system
See also: INTRODUCTION   See ICSC CARD: 1049