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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
3079	Caffeine	58-08-2	C8H10N4O2	Overview

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Pure Component Data

Property	Points	Sets	Temperature Range	States	Sets
Density	3	1	(hidden)	Solid	1
Freezing Point (Supercooled Liq. to Crystal/Solid)	1	1	505-505 K	Crystal > supercooled Crystal	1
Heat of Fusion	14	14	(hidden)	Solid-Liquid	14
Heat of Sublimation	25	11	298-445 K	Crystal 2-Vapor	4
				Crystal 1-Vapor	4
				Vapor-Solid	3
Heat of Transition	9	9	298-435 K	Crystal 2 > Crystal 1	5
				Solid-Solid	4
Heat of Vaporization	1	1	634-634 K	Vapor-Liquid	1
Melting Point	38	26	(hidden)	Solid-Liquid	21
				Crystal 1 > Liquid	4
				Further States	1
Molar Heat Capacity (cP)	124	2	81-387 K	Solid	2
Standard Heat of Sublimation	2	2	298-298 K	Vapor-Solid	2
Std. Heat of Combustion	1	1	298-298 K	Crystal 1	1
Std. Heat of Formation	1	1	298-298 K	Crystal 1	1
Transition Temperature	19	8	(hidden)	Crystal 2 > Crystal 1	6
				Crystal 3 > Crystal 1	1
				Solid-Solid	1
Vapor Pressure	116	8	315-743 K	Vapor-Solid	4
				Vapor-Liquid	2
				Crystal 2-Vapor	1
				Crystal 1-Vapor	1
Octanol-Water Partition Coefficients	15	15	293-303 K

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