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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
2018	Sulfur trioxide	7446-11-9	O3S	Overview

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Pure Component Data

Property	Points	Sets	Temperature Range	States	Sets
Critical Data	5	5	(hidden)	Critical Point	5
Density	54	8	0-487 K	Liquid	6
				Supercooled Liquid	1
				Solid	1
Dielectric Constant	2	2	292-294 K	Liquid	1
				Solid	1
Enthalpy (H-H298)	21	1	300-400 K	Liquid	1
Entropy	4	4	298-298 K	Gas/Vapor	4
G-function	49	4	100-1500 K	Gas/Vapor	4
Heat of Fusion	2	2	(hidden)	Solid-Liquid	2
Heat of Vaporization	5	5	290-335 K	Vapor-Solid	5
Ideal Gas Heat Capacity	49	4	100-1500 K	Ideal Gas	4
Melting Point	10	10	(hidden)	Solid-Liquid	7
				Solid2-Liquid-Vapor	1
				Crystal 1 > Liquid	1
				Solid-Liquid-Vapor	1
Molar Heat Capacity (cP)	35	3	290-400 K	Liquid	3
Std. Heat of Formation	1	1	298-298 K	Gas/Vapor	1
Surface Tension	26	3	291-373 K	Liquid	3
Thermal Expansion Coefficient	5	1	308-373 K	Liquid	1
Triple Point	1	1	(hidden)	Solid-Liquid-Vapor	1
Vapor Pressure	176	23	273-491 K	Vapor-Liquid	20
				Vapor-Solid	3
Viscosity (Dynamic)	13	2	288-318 K	Liquid	2

Pure Component Properties Data Bank Information Page

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