This review is Part 12 of a series of contributions initially sponsored by the critical properties group of the previous IUPAC Commission 1.2 on Thermodynamics, Subcommittee on Thermodynamic Data and then by IUPAC Project #2000-026-1-100, Critical Compilation of Vapor Liquid Critical Properties for the Physical and Biophysical Chemistry Division as a project of the International Association of Chemical Thermodynamics. It presents experimental data for the critical constants of organic compounds that are either new data published since, or data that was not included in, the initial reports. Where necessary revised recommendations are given, together with their uncertainties. Critical temperatures have been converted, where warranted, to the ITS-90 scale.