The full name of the RoHS directive is The Restriction of the use of Certain Hazardous Substances in Electrical and Electronic Equipment). In 2002, the European Union first put forward the concept of RoHS-the directive restricting the use of hazardous substances in electrical and electronic products (EEE).

Directive 2002/95/EC or RoHS: On July 21, 2011, the European Union restricted lead (Pb), mercury (Hg), cadmium (Cd), hexavalent chromium (Cr6+), polybrominated biphenyls (PBB) and polybrominated diphenyl ethers ( PBDE) is used in the production process of certain electrical and electronic equipment sold in the European Union.

Directive 2011/65/EU or RoHS 2: On January 2, 2013, the EU restricted lead (Pb), mercury (Hg), cadmium (Cd), hexavalent chromium (Cr VI), polybrominated biphenyls (PBB), polybrominated biphenyls Ether (PBDE), bis(2-ethylhexyl) phthalate (DEHP), tolylbutyl phthalate (BBP), dibutyl phthalate (DBP), phthalic acid Diisobutyl ester (DIBP) (abbreviated as o-benzene 4P).

In addition to the European Union, other countries and regions around the world such as China, California, Singapore, India, UAE, Turkey, etc. have also introduced RoHS control requirements, making RoHS the basic entry barrier for electronic and electrical products to enter the global market.

The content of each homogeneous material shall not exceed the following limits:

Lead: Limit 1000ppm

Mercury: limit 1000ppm

Hexavalent chromium: limit 1000ppm

Cadmium: 100ppm limit

Polybrominated biphenyls (PBB): limit 1000ppm

Polybrominated diphenyl ethers (PBDE): limit 1000ppm

Bis(2-ethylhexyl) phthalate (DEHP): limit 1000ppm

Dibutyl phthalate (DBP): limit 1000ppm

Butyl benzyl phthalate (BBP): limit 1000ppm

Diisobutyl phthalate (DIBP): 1000ppm