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Isobutane

Synonyms & Trade Names
2-Methylpropane [Note: Also see specific listing for n-Butane.]
CAS No.
75-28-5
RTECS No.
TZ4300000
DOT ID & Guide
1075 115
1969 115
Formula
CH3CH(CH3)2
Conversion
1 ppm = 2.38 mg/m3
IDLH
N.D.
See: IDLH INDEX
Exposure Limits
NIOSH REL
: TWA 800 ppm (1900 mg/m3)
OSHA PEL
†: none
Measurement Methods

None available
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 11°F.]
MW:
58.1
BP:
11°F
FRZ:
-255°F
Sol:
Slight		 VP(70°F): 3.1 atm
IP:
10.74 eV
Fl.P:
NA (Gas)
UEL:
8.4%
LEL:
1.6%
RGasD:
2.06
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   See ICSC CARD: 0901
 

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