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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
501	Octamethylcyclotetrasiloxane	556-67-2	C8H24O4Si4	Overview

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Pure Component Data

Property	Points	Sets	Temperature Range	States	Sets
Critical Data	5	5	(hidden)	Critical Point	5
Density	499	34	273-587 K	Liquid	30
				Liquid Phase of VLE	2
				Further States	2
Diffusion Coefficient	6	1	294-349 K	Liquid	1
Enthalpy (H-H0)	41	2	13-310 K	Liquid	1
				Solid	1
Entropy	41	2	13-310 K	Liquid	1
				Solid	1
Heat of Transition	1	1	(hidden)	Crystal 2 > Crystal 1	1
Heat of Vaporization	7	4	298-448 K	Vapor-Liquid	4
Ideal Gas Heat Capacity	4	1	450-495 K	Ideal Gas	1
Melting Point	5	5	(hidden)	Solid-Liquid	5
Molar Heat Capacity (cP)	93	4	13-433 K	Liquid	2
				Solid	2
Speed of Sound	247	23	293-550 K	Liquid	16
				Gas/Vapor	6
				Further States	1
Std. Heat of Combustion	1	1	298-298 K	Solid	1
Std. Heat of Formation	1	1	298-298 K	Gas/Vapor	1
Surface Tension	23	6	292-433 K	Liquid	6
Thermal Conductivity	149	3	296-513 K	Liquid	3
Transition Temperature	1	1	(hidden)	Crystal 2 > Crystal 1	1
Vapor Pressure	133	20	291-587 K	Vapor-Liquid	20
Viscosity (Dynamic)	53	10	278-423 K	Liquid	10
Viscosity (Kinematic)	5	3	293-343 K	Liquid	3

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