OCTANE†

Chemical Identification
Chemical Identification
CAS # 111-65-9
Formula

C₈H₁₈

Synonyms

n-octane

Physical Properties
Physical Properties
Physical description Colorless liquid with a gasoline-like odor.
Boiling point 258°F Molecular weight 114.2
Freezing point/melting point -70°F Vapor pressure 10 mmHg
Flash point 56°F Vapor density
Specific gravity 0.7 Ionization potential 9.82 eV
Lower explosive limit (LEL) 1.0% Upper explosive limit (UEL) 6.5%
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.) 1957
Sampling group OVSG-1
Sampler/Sampling media CSC tube (100/50 mg) [SKC 226-01]
Sampling time*

80 min

Sampling volume (TWA)*

4 L

Sampling flow rate (TWA)*

0.05 L/min

Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments GC-FID
Method reference OSHA 5000 (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 (2350 mg/m³)

REL-TWA
 

75 ppm (350 mg/m³)

TLV-TWA
 

300 ppm [1979]

PEL-TWA
 

300 ppm (1450 mg/m³)

PEL-STEL
 

 

REL-STEL
 

 

TLV-STEL
 

 

PEL-STEL
 

375 ppm (1800 mg/m³)

PEL-C
 

 

REL-C
 

385 ppm (1800 mg/m³) [15 minutes]

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. OSHA Construction and Maritime Industry PEL is 400 ppm (1900 mg/m³) as an 8-hr TWA. See 29 CFR 1926.55 Appendix A and 29 CFR 1915.1000 Table Z-Shipyards.

Notes:
 

 

Notes:
 

 

Notes:
 

 

Health factors:  See NIH-NLM PubChem. IDLH
 

1000 ppm

Carcinogenic classifications: Not listed Notes:
 

10% of LEL

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

 

Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - N-Octane

NIOSH: Pocket Guide to Chemical Hazards - Octane

Literature References

 
  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Octane, all isomers. See annual publication for most recent information.
  • NIOSH: Criteria for a Recommended Standard - Occupational Exposure to Alkanes (C5-C8). March 1977.
  • NIOSH: Occupational Health Guideline for Octane. September 1978.

Last Updated Date : 04/13/2021