Requirements of a Belgium regulation that requires manufacturers and importers to register chemical products containing nanomaterials came into effect starting January 1, 2016. Existing substances produced in nanoparticle state were to be registered by January 1, 2016. Manufacturers and importers of chemical mixtures containing a substance produced in a nanoparticle state have an additional year to register – until January 1, 2017. Additional information on the Belgium regulation and the registration process are available on the nanoregistry portal.