RoHS stands for Restriction of Hazardous Substances. RoHS, also known as Directive 2002/95/EC, originated in the European Union and restricts the use of specific hazardous materials found in electrical and electronic products (known as EEE). All applicable products in the EU market after July 1, 2006 must pass RoHS compliance. The substances banned under RoHS are lead (Pb), mercury (Hg), cadmium (Cd), hexavalent chromium (CrVI), polybrominated biphenyls (PBB), polybrominated diphenyl ethers (PBDE), and four different phthalates (DEHP, BBP, BBP, DIBP). RoHS Origin Storage 4GB DDR2 667MHz SODIMM 2Rx8 Non-ECC 1.8V, 4 GB, 1 x 4 GB, DDR2, 667 MHz, 200-pin SO-DIMM, Green Origin Storage 4GB DDR2 667MHz SODIMM 2Rx8 Non-ECC 1.8V. Component for: Laptop, Internal memory: 4 GB, Memory layout (modules x size): 1 x 4 GB, Internal memory type: DDR2, Memory clock speed: 667 MHz, Memory form factor: 200-pin SO-DIMM, CAS latency: 10, Product colour: Green