(hazardous substances) Acronym for Reduction of the use of Hazardous Substances. The RoHS Directive is an European Union ban on the placing on the EU market of new electrical and electronic equipment containing more than agreed levels of six hazardous materials: lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyl (PBB), and polybrominated diphenyl ether (PBDE) flame retardants. The RoHS Directive is linked with the European Community Waste Electrical and Electronic Equipment Directive (WEEE) which establishes targets for the collection, recycling and recovery of electrical goods and is part of an initiative to reduce the volume of large amounts of toxic e-waste. For more information, go to: www.rohs.eu. See also WEEE.