Partition coefficients. K. of phenol between an aqueous solution containing different salts and a compressed CO2 phase have been determined at T = 313 K. For NaCl and (CH3)(4)NBr a pressure range from 8 MPa to around 30 MPa was investigated, for KCl and NaBr measurements were performed at a pressure of 22 MPa. The salt concentration has been varied between (0.25 and 3.0) mol(.)dm(-3). With increasing pressure a rise in K-c is observed which typically is also found in systems free of salt. Salting-out was observed for the alkali salts, salting-in has been found for the ammonium salt, both effects increased with increasing salt concentration. From the concentration. dependence of the K-c values Setschenow coefficients k(s) have been derived. At p > 10 MPa values are obtained as found in two phase mixtures of water with other organic solvents at ambient pressure. This conclusion was confirmed with both literature and own experimental data in the case of salting-out by NaCl as well as for the salting-in by (CH3)(4)NBr from measurements with phenol in (water + cyclohexane) at T = 313 K. (C) 2003 Elsevier Science Ltd. All rights reserved.