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IUCLID (; International Uniform Chemical Information Database) is a software application to capture, store, maintain and exchange data on intrinsic and hazard properties of chemical substances. Distributed free of charge, the software is especially useful to chemical industry companies and to government authorities. It is the key tool for chemical industry to fulfill data submission obligations under REACH, a European Union law covering the production and use of chemical substances. The software is maintained by the European Chemicals Agency, ECHA. The latest version, version 5.6, was made available on 16 April 2014.