NIOSH logo and tagline

n-Butane

Related Pages
Synonyms & Trade Names
normal-Butane, Butyl hydride, Diethyl, Methylethylmethane [Note: Also see specific listing for Isobutane.]
CAS No.
106-97-8
RTECS No.
EJ4200000
DOT ID & Guide
1011 115
1075 115
Formula
CH₃CH₂CH₂CH₃
Conversion
1 ppm = 2.38 mg/m³
IDLH
1,600 ppm [10% LEL]
See: 2016-174
Exposure Limits
NIOSH REL
TWA 800 ppm (1900 mg/m³)
OSHA PEL
none See Appendix G
Measurement Methods
OSHA PV2010
See: NMAM or OSHA Methods
Physical Description
Colorless gas with a gasoline-like or natural gas odor. [Note: Shipped as a liquefied compressed gas. A liquid below 31°F.]
Molecular Weight
58.1
Boiling Point
31°F
Freezing Point
-217°F
Solubility
Slight
Vapor Pressure
2.05 atm
Ionization Potential
10.63 eV
Specific Gravity
0.6 (Liquid at 31°F)
Flash Point
NA (Gas)
Upper Explosive Limit
8.4%
Lower Explosive Limit
1.6%
Relative Gas Density
2.11
Flammable Gas
Incompatibilities & Reactivities
Strong oxidizers (e.g., nitrates & perchlorates), chlorine, fluorine, (nickel carbonyl + oxygen)
Exposure Routes
inhalation, skin and/or eye contact (liquid)
Symptoms
drowsiness, narcosis, asphyxia; liquid: frostbite
Target Organs
central nervous system
Personal Protection/Sanitation
(See protection codes)
Skin:Frostbite
Eyes:Frostbite
Wash skin:No recommendation
Remove:When wet (flammable)
Change:No recommendation
Provide:Frostbite wash
First Aid
(See procedures)
Eye:Frostbite
Skin:Frostbite
Breathing:Respiratory support
Respirator Recommendations

Not available.

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 0232
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health