METHYLCYCLOHEXANE†

Chemical Identification
Chemical Identification
CAS # 108-87-2
Formula
 
 

C₇H₁₄

Synonyms
 
 

cyclohexylmethane; hexahydrotoluene

Physical Properties
Physical Properties
Physical description Colorless liquid with a faint, benzene-like odor.
Boiling point 214°F Molecular weight 98.2
Freezing point/melting point -196°F Vapor pressure 37 mmHg
Flash point 25°F Vapor density
Specific gravity 0.77 Ionization potential 9.85 eV
Lower explosive limit (LEL) 1.2% Upper explosive limit (UEL) 6.7%
NFPA health rating 1 NFPA fire rating 3
NFPA reactivity rating 0 NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 1740
Sampling group
Sampler/Sampling media CSC tube (100/50 mg) [SKC 226-01]
Sampling time*
 
 

480 min

Sampling volume (TWA)*
 
 

4 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-FID
Method reference NIOSH 1500 (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.

Wipe Method
Wipe Method
Sampler/Sampling media
 
 

 

Bulk Method
Bulk Method
 
 

 

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

500 ppm (2000 mg/m³)

REL-TWA
 
 

400 ppm (1600 mg/m³)

TLV-TWA
 
 

400 ppm [1962]

PEL-TWA
 
 

400 ppm (1600 mg/m³)

PEL-STEL
 
 

 

REL-STEL
 
 

 

TLV-STEL
 
 

 

PEL-STEL
 
 

 

PEL-C
 
 

 

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:
 
 

 

Notes:
 
 

 

Notes:
 
 

 

Health factors:  See NIH-NLM PubChem. IDLH
 
 

1200 ppm

Carcinogenic classifications: Not listed Notes:
 
 

 

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

 

Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - Methylcyclohexane

NIOSH: Pocket Guide to Chemical Hazards - Methylcyclohexane

Literature References

 
 
  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Methyl cyclohexane. See annual publication for most recent information.
  • Elliott, T.H., Tao, R.C.C. and Williams, R.T.: The metabolism of methylcyclohexane. Biochem. J. 95: 70-76, 1965.
  • Parnell, M.J., Henningsen, G.M., Hixson, C.J., Yu, K.O., McDonald, G.A. and Serve, M.P.: The metabolism of methylcyclohexane in Fischer 344 rats. Chemosphere 17(7): 1321-1327, 1988.
  • Pohanish, R.P. (editor): Methylcyclohexane. In, Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 2. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 1546-1547.
  • No author: Identifying hydrocarbons. In, Forensics Primer: An Introduction to Environmental Forensic Geochemistry. ZymaX Forensics, Division of ZymaX™ Envirotechnology, Inc.

Last Updated Date : 01/28/2021