Label abbreviations descriptions

1,2,4-TRICHLOROBENZENE

Chemical Identification
CAS # 120-82-1
Formula
 

C₆H₃Cl₃
Synonyms
 

unsym-trichlorobenzene; 1,2,4-trichlorobenzol

Physical Properties
Physical description Colorless liquid or crystalline solid (below 63°F) with an aromatic odor.
Boiling point 416°F Molecular weight 181.4
Freezing point/melting point 63°F Vapor pressure 1 mmHg
Flash point 222°F Vapor density 6.26
Specific gravity 1.45 Ionization potential
Lower explosive limit (LEL) 2.5% at 302°F Upper explosive limit (UEL) 6.6% at 302°F
NFPA health rating 2 NFPA fire rating 1
NFPA reactivity rating 0 NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 2481
Sampling group
Sampler/Sampling media PTFE filter & XAD-2 (100/50 mg) [SKC 225-17A & SKC 226-30-4]
Sampling time*
 

 
Sampling volume (TWA)*
 

3-12 L
Sampling flow rate (TWA)*
 

0.01-0.2 L/min
Sampling volume (STEL/Peak/C)*
 

 
Sampling flow rate (STEL/Peak/C)*
 

 
Analytical method instruments GC
Method reference NIOSH 5517 (fully validated)
Notes
 

 
Special requirements
 

 

* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Bulk/Wipe Method
Wipe Sampler/Sampling media
 

 
Bulk Method
 

 

On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)

Exposure Limits
OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
NIOSH REL
Up to 10-hour TWA
(ST) STEL
(C) Ceiling
ACGIH TLV©
8-hour TWA
(ST) STEL
(C) Ceiling
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
PEL-TWA
 

 

 REL-TWA
 

 

 TLV-TWA
 

 

 PEL-TWA
 

 
PEL-STEL
 

 

 REL-STEL
 

 

 TLV-STEL
 

 

 PEL-STEL
 

 
PEL-C
 

 

 REL-C
 

5 ppm (40 mg/m³)

 TLV-C
 

5 ppm [1975]

 PEL-C
 

5 ppm (40 mg/m³)
Skin notation
 

NA

 Skin notation
 

N

 Skin notation
 

N

 Skin notation
 

N
Notes:
 

Not established

 Notes:
 

 

 Notes:
 

 

 Notes:
 

 
Health factors:  See NIH-NLM PubChem. IDLH
Carcinogenic classifications: EPA-D Notes:
 

 
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
 

 

Additional Resources and Literature References

Last Updated Date : 12/14/2020