what is the difference between rohs 1 and rohs 2?
It replaced the first EU RoHS directive 2002/95/EC (RoHS 1) and entered into force on 21 July 2011. Like RoHS 1, RoHS 2 restricts the use of certain hazardous substances (lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers) in electrical and electronic equipment (EEE).