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Dortmund Data Bank Thermophysical Data for Process Design Contact: ☎ +49 441 361819 0 or ✉ info@ddbst.com

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DDB#	Name	CAS-RN	Formula
91	Heptane	142-82-5	C7H16	Overview

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Pure Component Data

Property	Points	Sets	Temperature Range	States	Sets
Compressibility (isentropic)	22	11	293-353 K	Liquid	11
Compressibility (isothermal)	9	3	293-333 K	Liquid	3
Critical Data	58	58	(hidden)	Critical Point	58
Density	8085	986	183-673 K	Liquid	922
				Further States	64
Dielectric Constant	170	46	183-363 K	Liquid	46
Diffusion Coefficient	14	4	193-363 K	Liquid	4
Enthalpy (H-H(T))	116	5	298-604 K	Gas/Vapor	3
				Liquid	2
Entropy	4	4	298-298 K	Gas/Vapor	4
Flash Point	10	10	(hidden)	Liquid	10
G-function	52	3	200-1500 K	Gas/Vapor	3
Heat of Fusion	12	12	(hidden)	Solid-Liquid	10
				Solid-Liquid-Vapor	2
Heat of Vaporization	54	19	283-540 K	Vapor-Liquid	19
Ideal Gas Heat Capacity	68	7	200-1500 K	Ideal Gas	7
Melting Point	54	44	(hidden)	Solid-Liquid	43
				Further States	1
Molar Heat Capacity (cP)	2181	179	5-627 K	Liquid	145
				Solid	17
				Gas/Vapor	12
				Further States	5
Molar Heat Capacity (cV)	501	25	205-698 K	Liquid	13
				Gas/Vapor	11
				Further States	1
Molar Saturation Heat Capacity	15	2	278-348 K	Liquid	2
Second Virial Coefficient	56	11	298-650 K	Gas/Vapor	11
Speed of Sound	2181	236	186-651 K	Liquid	222
				Further States	14
Standard Heat of Vaporization	2	1	298-298 K	Vapor-Liquid	1
Std. Heat of Combustion	3	3	298-298 K	Liquid	3
Std. Heat of Formation	3	3	298-298 K	Gas/Vapor	2
				Liquid	1
Surface Tension	321	57	183-540 K	Liquid	50
				Liquid Phase of VLE	3
				Vapor-Liquid	3
				Further States	1
Thermal Conductivity	1547	178	183-692 K	Liquid	118
				Gas/Vapor	50
				Further States	10
Thermal Expansion Coefficient	127	9	278-348 K	Liquid	9
Triple Point	1	1	(hidden)	Solid-Liquid-Vapor	1
Vapor Pressure	1839	436	185-540 K	Vapor-Liquid	436
Vapor Pressure (Boiling Point Only)	1	1	(hidden)	Vapor-Liquid	1
Viscosity (Dynamic)	1835	263	180-634 K	Liquid	230
				Gas/Vapor	24
				Further States	9
Viscosity (Kinematic)	75	21	200-372 K	Liquid	21
Octanol-Water Partition Coefficients	7	7	298 K
Mixture Flash Points	2	2	494-500 K	n.a.	n.a.

Pure Component Properties Data Bank Information Page
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