Solubilities of n-tetracosane, n-pentacosane, n-hexacosane, n-heptacosane and n-nonacosane in supercritical carbon dioxide were measured in the pressure range 10-50 MPa and 313 K. The solubility data were found to be internally self-consistent according to the theory of dilute solutions. Krichevskii parameters were calculated from the data and exhibited regular trends with the carbon number of the n-alkane. The Krichevskii parameter vs carbon number behavior was also consistent with that found in our earlier work for mixtures of low and high molecular weight n-alkanes in carbon dioxide. (C) 2003 Elsevier B.V. All rights reserved.