Contents - Index



MDM provides high accuracy thermodynamic properties for octamethyltrisiloxane (C8H24O2Si4, MW=236.53 g/gmole, CAS#=107-51-7) using the Fundamental Equation of State presented in:


Monika Thol, Frithjof H. Dubberke,Elmar Baumhogger, Jadran Vrabec, and Roland Span

Speed of Sound Measurements and Fundamental Equations of State for Octamethyltrisiloxane and Decamethyltetrasiloxane

J. Chem. Eng. Data 2017, 62, 2633-2648


The correlation is implemented for temperatures in the range between 190 K and  600 K and for pressures less than 130 MPa.   


Values of specific enthalpy and entropy are referred to 0 for saturated liquid at the normal boiling point (425.7 K).


Note that this correlation was implemented in version 10.465 and replaces an older correlation from:

Colonna, P., Nannan, N.R.and Guardone, A,

Multiparameter equations of state for siloxanes:

Fluid Phase Equilibria, 263 (2008) 115-130


The viscosity and thermal conductivity for the liquid phase for temperatures between 250 K and 400 K are from;


Rima Abbas, E. Christian Ihmels, Sabine Enders, and J€urgen Gmehling

Measurement of Transport Properties for Selected Siloxanes and Their Mixtures Used as Working Fluids for Organic Rankine Cycles

Ind. Eng. Chem. Res. 2011, 50, 8756-8763


Viscosity and thermal conductivity for the vapor phase are estimated using a corresponding states approach as described in:


Klein, S.A., McLinden, M.O., and Laesecke , A., 

An improved extended corresponding states method for estimation of viscosity of pure refrigerants and mixtures

Int. J. of Refrigeration, 20, pp. 208-217, 1997



McLinden et al., 

An extended corresponding states model for the thermal conductivity of refrigerants and refrigerant mixtures

Int. J. of Refrigeration, 23, pp. 43-63, 2000


Surface Tension data are from:


A. Mulero and I. Cachadiña

Recommended Correlations for the Surface Tension of Several Fluids Included in the REFPROP Program

Journal of Physical and Chemical Reference Data 43, 023104 (2014); 



Fluid Property Information