n-Heptane, C 7 H 16

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n-Heptane, C₇H₁₆
Categories:	Fluid; Solvent
Key Words:	C7H16
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Physical Properties	Metric	English	Comments

Density	0.684 g/cc @Temperature 20.0 °C	0.0247 lb/in³ @Temperature 68.0 °F
Viscosity	0.409 cP @Temperature 20.0 °C	0.409 cP @Temperature 68.0 °F	Dynamic Viscosity
Molecular Weight	100.205 g/mol	100.205 g/mol
Vapor Pressure	0.047397 bar @Temperature 20.0 °C	35.551 torr @Temperature 68.0 °F
Surface Tension	19.7 dynes/cm @Temperature 20.0 °C	19.7 dynes/cm @Temperature 68.0 °F

Chemical Properties	Metric	English	Comments
Critical Pressure	27.4 bar	20500 torr
Critical Temperature	267 °C	513 °F
Critical Density	0.232 g/cc	0.00838 lb/in³
Critical Molar Volume	432 cm³/mol	26.4 in³/mol

Electrical Properties	Metric	English	Comments
Dielectric Constant	1.925 @Temperature 20.0 °C	1.925 @Temperature 68.0 °F

Thermal Properties	Metric	English	Comments
Heat of Vaporization	316.3 J/g	136.1 BTU/lb
Specific Heat Capacity	2.245 J/g-°C	0.5366 BTU/lb-°F
	1.656 J/g-°C @Temperature 25.0 °C	0.3958 BTU/lb-°F @Temperature 77.0 °F	Vapor
Thermal Conductivity	0.124 W/m-K @Temperature 20.0 °C	0.861 BTU-in/hr-ft²-°F @Temperature 68.0 °F
Melting Point	-90.6 °C	-131 °F
Boiling Point	98.5 °C	209 °F

Optical Properties	Metric	English	Comments
Refractive Index	1.388 @Wavelength 589.3 nm	1.388 @Wavelength 589.3 nm	n_D

Descriptive Properties
Antoine's Vapor Pressure A Parameter	15.8737
Antoine's Vapor Pressure B Parameter	2911.32
Antoine's Vapor Pressure C Parameter	-56.51
Antoine's Vapor Pressure Formula	ln π_p = A - B/(T+C)		P in mmHg and T in K
CAS registry number (CARN)	142-82-5
Chemical Formula	C₇H₁₆
Critical Compressibility (Zc)	0.263
Dynamic Viscosity Formula	log₁₀ η=A(1/T-1/B)
Dynamic Viscosity Parameter A	436.73
Dynamic Viscosity Parameter B	232.53
Henry's Law Constant (atm m³/mol)	0.000259
Molar Heat Capacity (298K)	165.918 J/mol-K
Molar Heat Capacity of Vapor a Parameter	-5.1421
Molar Heat Capacity of Vapor b Parameter	0.6757
Molar Heat Capacity of Vapor c Parameter	-0.0003648
Molar Heat Capacity of Vapor d Parameter	7.653E-08
Molar Heat Capacity of Vapor Formula	C_p = a + bT + cT² + dT³		C_p in J/mol-K
UN Number	1206
UV cut-off (nm)	197

References for this datasheet.

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