AbstractData in the literature on the thermodynamic behaviour of solute elements in liquid dilute iron as the solvent have been collected and collated. The results have been expressed in terms of the first- and second-order free-energy interaction coefficients. Those based on composition in wt.-%, ei j and ri j are tabulated and the source materials are referenced. The thermodynamic properties of many alloying elements at infinite dilution in liquid iron are also tabulated.