The Restrictions of Hazardous Substances, commonly referred to as the RoHS Directive, is a lead-free initiative launched by the European Union in 2003 and became effective July 1st, 2006. This directive restricts the use of six dangerous substances frequently used in the manufacturing of electronic equipment.
The below table represents those substances deemed toxic by the RoHS Directive along with their corresponding levels of concentrated allowable weight.
|Lead (Pb)||0.1% by weight|
|Cadmium (Cd)||0.01% by weight|
|Mercury (Hg)||100ppm or less|
|Hexavalent chromium (Hex-Cr)||0.01% by weight|
|Polybrominated biphenyls (PBB)||0.1% by weight|
|Polybrominated diphenyl ethers (PBDE)||0.1% by weight|
The presence of these materials is considered a health hazard to workers as well as a threat to the environment.