Isobutane
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CAS
75-28-5
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CH3CH(CH3)2
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RTECS
TZ4300000
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Synonyms & Trade Names
2-Methylpropane [Note: Also see specific listing for n-Butane.]
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DOT ID & Guide
1075 / 115
1969 / 115
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Exposure
Limits
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NIOSH REL: TWA 800 ppm (1900 mg/m3)
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OSHA PEL†: none
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IDLH
N.D.
See: IDLH INDEX
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Conversion
1 ppm = 2.38 mg/m3
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Physical Description
Colorless gas with a gasoline-like or natural gas odor. [Note: Shipped as a liquefied compressed gas. A liquid below 11°F.]
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MW: 58.1
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BP: 11°F
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FRZ: -255°F
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Sol: Slight
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VP(70°F): 3.1 atm
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IP: 10.74 eV
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RGasD: 2.06
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Fl.P: NA (Gas)
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UEL: 8.4%
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LEL: 1.6%
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Flammable Gas
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Incompatibilities & Reactivities
Strong oxidizers (e.g., nitrates & perchlorates), chlorine, fluorine, (nickel carbonyl + oxygen)
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Measurement Methods
None available
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
Skin: Frostbite
Eyes: Frostbite
Wash skin: No recommendation
Remove: When wet (flammable)
Change: No recommendation
Provide: Frostbite wash
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First Aid (See procedures)
Eye: Frostbite
Skin: Frostbite
Breathing: Respiratory support
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Respirator Recommendations
Not available.
Important additional information about respirator selection
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Exposure Routes
inhalation, skin and/or eye contact (liquid)
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Symptoms
Drowsiness, narcosis, asphyxia; liquid: frostbite
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Target Organs
central nervous system
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See also: INTRODUCTION
See ICSC CARD: 0901 |
