RoHS is a mandatory standard set by European Union legislation and its full title is the directive of Hazardous Substances restricting the use of certain Hazardous Substances in electrical and electronic equipment.The standard has been formally implemented since July 1, 2006. It is mainly used to regulate the material and process standards of electrical and electronic products to make it more conducive to human health and environmental protection.The standard aims to eliminate lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls and polybrominated diphenyl ethers from electrical and electronic products.