An „Advisory Committee on Existing Chemicals“ (BUA) was appointed 1982 by the German Chemical Society. The members have developed, from a practical point of view, a selective procedure for these chemicals (in total about 100.000 in the European Community) which, in a first phase, resulted in two lists of together 135 substances. In a second phase, based on a survey of the German Chemical Industry Association, a third list of ca. 435 substances was established in 1989 to 1993. The data necessary for the evaluation of these chemicals are collected, critically assessed and published regulary as BUA Reports. Up-to-date, reports on nearly 330 substances have been published. They may serve as a reliable aid for the instignation of measures, if necessary, to responsible persons and competent authorities.