Label abbreviations descriptions

CHLOROFORM (TRICHLOROMETHANE)†

Chemical Identification
CAS # 67-66-3
Formula

CHCl₃
Synonyms

methane trichloride; trichloromethane

Physical Properties
Physical description Colorless liquid with a pleasant odor.
Boiling point 143°F Molecular weight 119.4
Freezing point/melting point -82°F Vapor pressure 160 mmHg
Flash point Vapor density 4.12
Specific gravity 1.48 Ionization potential 11.42 eV
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating 2 NFPA fire rating 0
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.) 0670
Sampling group
Sampler/Sampling media CSC tube (100/50 mg) [SKC 226-01]
Sampling time*

50 min
Sampling volume (TWA)*

10 L
Sampling flow rate (TWA)*

0.2 L/min
Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments GC-FID
Method reference OSHA 5 (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 Detector tube Detector tube Detector tube
Model/Type Dräger - Chloroform 2/a, 6728861 Gastec 137L Matheson-Kitagawa 8014-152S
Sampling information
(see manufacturer instructions) 		10 strokes, approx 1-10 ppm range, uncertainty approx 33% 3-5 strokes, 0.1-27 ppm range, uncertainty 16% for 0.5-2 ppm, 8% for 2-10 ppm 2-4 strokes, approx 20-500 ppm range

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

2 ppm (9.78 mg/m³)
PEL-STEL REL-STEL

2 ppm (9.78 mg/m³) [60 minutes]

 TLV-STEL PEL-STEL
PEL-C

50 ppm (240 mg/m³)

 REL-C TLV-C PEL-C
Skin notation

N

 Skin notation

N

 Skin notation

N

 Skin notation

N
Notes:

See 29 CFR 1910.1000 Table Z-1.

 Notes:

CARCINOGEN (Ca): REDUCE EXPOSURE TO LOWEST FEASIBLE CONCENTRATION. See Appendix A

 Notes:

Visit the ACGIH TLV site for specific data

 Notes:
Health factors:  See NIH-NLM PubChem. IDLH

500 ppm
Carcinogenic classifications: IARC-2B, NIOSH-Ca, NTP-R, TLV-A3, EPA-B2; L; NL Notes:

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

--/50 ppm/5000 ppm

Additional Resources and Literature References

Last Updated Date : 05/03/2024