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Thermophysical Data for Process Design
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DDB#
Name
CAS-RN
Formula
501
Octamethylcyclotetrasiloxane
556-67-2
C
8
H
2
4
O
4
Si
4
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
Pure Component Properties Data Bank Information Page
Dortmund Data Bank Version: February 2024
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