Chemical substances, which were deemed to be on the European Community market between 1 January 1971 and 18 September 1981. An “existing” chemical substance is in the EU defined as any chemical substance listed in the European Inventory of Existing Commercial Substances (EINECS), an inventory containing 100,195 substances. The Regulation 793/93 foresees that the evaluation and control of the risks posed by existing chemicals will be carried out in four steps: data collection, priority setting, risk assessment and risk reduction. Any chemical substance marketed after 18 September 1981 is called a new chemical. For more information, visit the European Chemicals Bureau.