Isobutane
C4H10

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General Characteristics Health Hazards Material Recommendations
A colorless, flammable and liquefied gas with a faint odor. A simple asphyxiant Noncorrosive, most common materials can be used.
TLV-TWA Flammable Limits DOT Class / Label
None Established 1.8 - 8.5% 2.1 / Flammable Gas
Molecular Weight Specific Gravity Specific Volume
58.1 2.01 @ 70° F 6.5 cu.ft./lb @ 70° F
CGA Valve Outlet CAS Registry No. UN Number
510 75-28-5 1969
National Stock Number (NSN) Applicable to Isobutane MIL Specs/ Fed Specs
MSDS for Isobutane

Grade
Part #		 Purity Minimum Cylinder
Size		 Volume
LBS		 Pressure
@ 70 F		 Comments
Research
467100 		99.99% Min.
 002 0.875 31

None
Instrument
405000 		99.5% Min.
 454
110
044
016
007
 485
116
35
15
5
 31
31
31
31
31
Chemically Pure
467200		 99.0% Min. 454
110
044
016
007
 485
116
35
15
5
 31
31
31
31
31
Uses: Isobutane - C4H10 - in its pure form is used for calibration work in instruments such as temperature and pressure gauges and in the filling of thermbulbs for such instruments. It is industrially important as an intermediate in the manufacture of aviation fuel and in manufacture of many organic chemicals.