At request of the Minister of Social Affairs and Employment, the Health Council of the Netherlands evaluates and judges the carcinogenic properties of substances to which workers are occupationally exposed. The evaluation is performed by the Subcommittee on Classifying Carcinogenic Substances of the Dutch Expert Committee on Occupational Standards of the Health Council, hereafter the committee. In this report the committee evaluated 1,1,1-trichloroethane. The compound is used as a solvent for adhesives, for degreasing in metallic and electronic industries, and in the manufacture of vinylidene chloride. The committee is of the opinion that the available data are insufficient to evaluate the carcinogenic properties of 1,1,1-trichloroethane.