Since 13 December 2006, the European Union is in a phase of implementation of a new harmonized legislative framework in the field of chemical industry: the REACH regulation (an acronym for Registration, Evaluation, Authorization, and Restriction of Chemicals). From a law and economics perspective, a large set of questions emerge with this regulation. In our entry, we will only shed some light on those which have already been analyzed, such as competition, data sharing, innovation, and socioeconomic analysis.