BUTANE

Chemical Identification
Chemical Identification
CAS # 106-97-8
Formula

C₄H₁₀

Synonyms

normal-butane (n-butane); butyl hydride; diethyl; methylethylmethane

Physical Properties
Physical Properties
Physical description Colorless gas with a gasoline-like or natural gas odor.
Boiling point 31°F Molecular weight 58.1
Freezing point/melting point -217°F Vapor pressure 2.05 atm
Flash point -76°F Vapor density 2.11
Specific gravity 0.6 at 32°F Ionization potential 10.63 eV
Lower explosive limit (LEL) 1.6% Upper explosive limit (UEL) 8.4%
NFPA health rating 1 NFPA fire rating 4
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.) 0420
Sampling group
Sampler/Sampling media 2 tubes, ORBO™ 91 Carbosieve® S-III (130/65) in series [Supelco 20360]
Sampling time*

60 min

Sampling volume (TWA)*

3 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 PV2010 (partially 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 Detector tube Detector tube
Model/Type Gastec 104 Matheson-Kitagawa 8014-221SA
Sampling information
(see manufacturer instructions)
1 stroke, 5-1400 ppm range, uncertainty 16% for 25-400 ppm, 8% for 400-1400 ppm 1 stroke, approx 0.02-0.6% range
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 REL-TWA

800 ppm (1900 mg/m³)

TLV-TWA

1000 ppm [2012]

PEL-TWA

800 ppm (1900 mg/m³)

PEL-STEL REL-STEL TLV-STEL PEL-STEL
PEL-C REL-C TLV-C PEL-C
Skin notation

NA

Skin notation

N

Skin notation

N

Skin notation

NA

Notes:

Not established

Notes: Notes:

(EX) Explosion hazard: the substance is a flammable asphyxiant or excursions above the TLV could approach 10% of the LEL.

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

NIOSH: Pocket Guide to Chemical Hazards - n-Butane

Literature References

  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Butane, all isomers. See annual publication for most recent information.
  • Aydin, Y. and Ozcakar L.: Occupational hepatitis due to chronic inhalation of propane and butane. Int. J. Clin. Pract. 57(6): 546, 2003.
  • Fuke, C., et al.: A fatal case considered to be due to cardiac arrhythmia associated with butane inhalation. Leg. Med. (Tokyo) 4(2): 134-138, 2002.
  • Pohanish, R.P. (editor): Butanes. In, Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 1. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 386-388.
  • Rohrig, T.P.: Sudden death due to butane inhalation. Am. J. Forensic Med. Pathol. 18(3): 299-302, 1997.
  • Tsukamoto, S., Chiba, S., Muto, T., Ishikawa, T. and Shimamura, M.: Study on the metabolism of volatile hydrocarbons in mice-propane, n-butane, and iso-butane. J. Toxicol. Sci. 10(4): 323-332, 1985.

Last Updated Date : 12/18/2020