2-Methylbutane, C 5 H 12

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2-Methylbutane, C₅H₁₂
Categories:	Fluid; Solvent
Key Words:	C5H12
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Physical Properties	Metric	English	Comments

Density	0.620 g/cc @Temperature 20.0 °C	0.0224 lb/in³ @Temperature 68.0 °F
Viscosity	0.217 cP @Temperature 20.0 °C	0.217 cP @Temperature 68.0 °F	Dynamic Viscosity
Molecular Weight	72.151 g/mol	72.151 g/mol
Vapor Pressure	0.766462 bar @Temperature 20.0 °C	574.895 torr @Temperature 68.0 °F
Surface Tension	13.7 dynes/cm @Temperature 20.0 °C	13.7 dynes/cm @Temperature 68.0 °F

Chemical Properties	Metric	English	Comments
Critical Pressure	33.8 bar	25400 torr
Critical Temperature	187 °C	369 °F
Critical Density	0.236 g/cc	0.00853 lb/in³
Critical Molar Volume	306 cm³/mol	18.7 in³/mol

Thermal Properties	Metric	English	Comments
Heat of Vaporization	342.1 J/g	147.2 BTU/lb
Specific Heat Capacity	1.645 J/g-°C @Temperature 25.0 °C	0.3932 BTU/lb-°F @Temperature 77.0 °F	Vapor
Melting Point	-159.9 °C	-255.8 °F
Boiling Point	27.9 °C	82.2 °F

Optical Properties	Metric	English	Comments
Refractive Index	1.351 @Wavelength 589.3 nm	1.351 @Wavelength 589.3 nm	n_D

Descriptive Properties
Antoine's Vapor Pressure A Parameter	15.6338
Antoine's Vapor Pressure B Parameter	2348.67
Antoine's Vapor Pressure C Parameter	-40.05
Antoine's Vapor Pressure Formula	ln π_p = A - B/(T+C)		P in mmHg and T in K
CAS registry number (CARN)	78-78-4
Chemical Formula	C₅H₁₂
Critical Compressibility (Zc)	0.271
Dipole moment (p/C.m)	3.336E-28
Dynamic Viscosity Formula	log₁₀ η=A(1/T-1/B)
Dynamic Viscosity Parameter A	367.32
Dynamic Viscosity Parameter B	191.58
Molar Heat Capacity (298K)	118.694 J/mol-K
Molar Heat Capacity of Vapor a Parameter	-9.5186
Molar Heat Capacity of Vapor b Parameter	0.5063
Molar Heat Capacity of Vapor c Parameter	-0.0002728
Molar Heat Capacity of Vapor d Parameter	5.72E-08
Molar Heat Capacity of Vapor Formula	C_p = a + bT + cT² + dT³		C_p in J/mol-K
UN Number	1265

References for this datasheet.

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