**MDM**

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*

and

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); *