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Local Exhaust: Continuous ventilation recommend.
Special: Explosion proof fans and motors.
Safeguard for Eyes: No special protecting measures are required under normal
conditions. Chemical proof safeguard glasses should be worn under special conditions.
Safeguard for Bodies: Wear antistatic suits.
Safeguard for Hands: Wear ordinary proof gloves.
Part.9 Physical And Chemical Properties
Items
Isobutane
Molecular Weight
58.124
Normal Melting Point (in air and at 101.3kPa), K
113.55
Normal Boiling Point (at 101.3kPa), K
261.43
Explosion Limit (at 293.15K and 101.3kPa, in air), %(V)
(at 293.15K and 101.3kPa, in oxygen), %(V)
1.8～8.4
1.8～40
Auto ignition Temperature (at 101.3kPa and in air), K
735.15
Flash Point, K
190
Net Combustion Heat
(real gas, at 288.7K and 101.3kPa), kJ/mol
(liquid, at its saturation pressure and 298.15K), kJ/mol
2645
2627
△H
0
f (ideal gas, at 298.15K), kJ/mol
(liquid, at 298.15K), kJ/mol
-134.51
-158.4
△G
0
f (at 298.15K and 101.3kPa), kJ/mol
-20.88
Heat of Melting, kJ/mol
4.540
Heat of Evaporation (at normal boiling point), kJ/mol
21.30
Density (gas, at 288.7K and 101.3kPa), kg/m
3
2.5285
Density (liquid, at its saturation pressure and 298.15K), kg/m
3
551.0
Critical Points
Pressure, MPa
Temperature, K
Density, kg/m
3
Volume, cm
3
/mol
3.648
408.13
221.0
263
Compressibility Factor
0.283
S
0
(ideal gas, at 298.15K), J/mol·K
295.4
Cp
0
(ideal gas, at 288.7K), J/mol·K
(ideal gas, at 298.15K), J/mol·K
94.16
96.65
Cp
0
/Cv
0
(ideal gas, at 288.7K)
1.097