RoHS Restricted Substances
RoHS specifies maximum levels for the following six restricted materials:
Lead (Pb): < 1000 ppm
Lead is commonly used in the electrical and electronics industry in solder, lead-acid batteries, electronic components, cable sheathing and in the glass of cathode-ray tubes.
Mercury (Hg): < 100 ppm
Mercury is widely used metals in the production of electrical and electronic appliances and is concentrated in batteries, switches and thermostats, and fluorescent lamps.
Cadmium (Cd): < 100 ppm
Cadmium is used in electronic equipment, car batteries, and pigments.
Hexavalent Chromium (Cr VI) < 1000 ppm
While some forms of chromium are non-toxic, Chromium VI can produce toxic effects.
Polybrominated Biphenyls (PBB): 1000 ppm
These are flame retardants found in electronic and electrical appliances. They have been found in indoor dust and air through evaporation from plastics.
Polybrominated Diphenyl Ethers (PBDE): < 1000 ppm
These are also flame retardants found in electronic and electrical appliances. Combustion of printed wiring boards release toxic emissions.