What are the hazardous substances referred to in the EU rohs directive? RoHS Directive restricts the use of the following six categories of hazardous substances: mercury (mercury), lead, cadmium, chromium, polybrominated biphenyls (PBB), polybrominated diphenyl ethers (PBDE). The standard is: cadmium: less than 100ppm; Lead: less than 1000ppm; Less than 2500ppm in steel alloy; Less than 4000ppm in aluminum alloy; Less than 40000 ppm in copper alloy; Mercury: less than 1000ppm; Hexavalent chromium: less than 1000ppm.

RoHS is a mandatory standard formulated by EU legislation. Its full name is the "Restriction of Hazardous Substances". This standard has been officially implemented since July 1, 2006, and is mainly used to standardize the material and process standards of electronic and electrical products, making it more conducive to human health and environmental protection. The purpose of this standard is to eliminate lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls and polybrominated diphenyl ethers (note: the correct Chinese name of PBDE refers to polybrominated diphenyl ethers, and polybrominated diphenyl ethers are incorrect), a total of 6 substances in electrical and electronic products, and the content of cadmium shall not exceed 0.01%.

RoHS is a mandatory standard formulated by EU legislation. Its full name is the "Restriction of Hazardous Substances". This standard has been formally implemented since July 1, 2006, and is mainly used to standardize the material and process standards of electronic and electrical products, making it more conducive to human health and environmental protection. The purpose of this standard is to eliminate lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls and polybrominated diphenyl ethers (note: PBDE's correct Chinese name refers to polybrominated diphenyl ethers, and polybrominated diphenyl ethers are wrong), a total of 6 substances in electrical and electronic products, and the content of cadmium shall not exceed 0.01%.