The substances banned under ROHS are lead (Pb), mercury (Hg), cadmium (Cd), hexavalent chromium (CrVI), polybrominated biphenyls (PB and polybrominated diphenyl ethers (PBDE). The restricted materials are hazardous to the environment and pollute landfills, and are dangerous in terms of occupational exposure during manufacturing and recycling.
https://www.iascertification.c....om/rohs-certificatio