RoHS是由歐盟立法制定的一項強制性標準，它的全稱是《關於限制在電子電氣設備中使用某些有害成分的指令》(Restriction of Hazardous Substances)。該標準已於2006年7月1日開始正式實施，主要用於規範電子電氣產品的材料及工藝標準，使之更加有利於人體健康及環境保護。該標準的目的在於消除電器電子產品中的鉛、汞、鎘、六價鉻、多溴聯苯和多溴二苯醚（注意：PBDE正確的中文名稱是指多溴二苯醚，多溴聯苯醚是錯誤的說法）共6項物質，並重點規定了鎘的含量不能超過0.01%。
1 Mercury in compact fluorescent lamps not exceeding 5 mg per lamp
2 Mercury in straight fluorescent lamps for general purposes not exceeding:
- halophosphate 10 mg
- triphosphate with normal lifetime 5 mg
- triphosphate with long lifetime 8 mg.
3 Mercury in straight fluorescent lamps for special purposes.
4 Mercury in other lamps not specifically mentioned in this Annex.
5 Lead in glass of cathode ray tubes, electronic components and fluorescent tubes.
6 Lead as an alloying element in steel containing up to 0.35% lead by weight, aluminium containing up to 0.4% lead by weight and as a copper alloy containing up to 4% lead by weight.
7 - lead in high melting temperature type solders (i.e. lead-based alloys containing 85 % by weight or more lead)
- lead in solders for servers, storage and storage array systems, network infrastructure equipment for switching, signalling, transmission as well as network management for telecommunications
- lead in electronic ceramic parts (e.g. piezoelectronic devices).
8 Cadmium and its compounds in electrical contacts and cadmium plating except for applications banned under Directive 91/338/EEC (1) amending Directive 76/769/EEC (2) relating to restrictions on the marketing and use of certain dangerous substances and preparations
9 Hexavalent chromium as an anti-corrosion of the carbon steel cooling system in absorption refrigerators.
10 Lead used in compliant pin connector systems
11 Lead as a coating material for the thermal conduction module c-ring
12 Lead and cadmium in optical and filter glass
13 Lead in solders consisting of more than two elements for the connection between the pins and the package of microprocessors with a lead content of more than 80% and less than 85% by weight
14 Lead in solders to complete a viable electrical connection between semiconductor die and carrier within integrated circuit Flip Chip packages
15 DecaBDE in polymeric applications
16 Lead in lead-bronze bearing shells and bulbs
17 Lead in linear incandescent lamps with silicate coated tubes
18 Lead halide as radiant agent in High Intensity Discharge (HID) lamps used for professional reprography applications
19 Lead as activator in the fluorescent powder (1% lead by weight or less) of discharge lamps when used as sun tanning lamps containing phosphors such as BSP (BaSi2O5:Pb) as well as when used as specially lamps for diazo-printing reprography, lithography, insect traps, photochemical and curing processes containing phosphors such as SMS ((Sr,Ba)2MgSi2O7:Pb)
20 Lead with PbBiSn-Hg and PbInSn-Hg in specific compositions as main amalgam and with PbSn-Hg as auxiliary amalgam in very compact Energy Saving Lamps (ESL)
21 Lead oxide in glass used for bonding front and rear substrates of flat fluorescent lamps used for Liquid Crystal Displays (LCD)
22 Lead and cadmium in printing inks for the application of enamels on borosilicate glass.
23 Lead as impurity in RIG (rare earth iron gamet) Faraday rotators used for fibre optic communication systems.
24 Lead in finishes of fine pitch components other than connectors with a pitch of 0.65mm or less with NiFe lead frames and lead in finishes of fine pitch components other than connectors with a pitch of 0.65mm or less with coppler lead frames.
25 Lead in solders for the soldering to machined through hole discoidal and planar array ceramic multilayer capacitors.
26 Lead oxide in plasma display panels (PDP) and surface conduction electron emitter displays (SED) used in structural elements, notably in the front and rare glass dielectric layer, the bus electrode, the black stripe, the address electrode, the barrier ribs, the seal frit and frit ring as well as in print pastes.
27 Lead oxide in the glass envelope of Black Light Blue (BLB) lamps.
28 Lead alloys as solder for transducers used in high-powered (designated to operate for several hours at acoustic power levels of 125 dB SPL and above) loudspeakers.
29 Hexavalent chromium in corrosion preventive coatings of unpainted metal sheetings and fasterners used for corrosion protection and Electromagnetic Interference Shielding in equipment falling under category three of Directive 2002/96/EC (IT and telecommunications equipment). Exemption granted until 1 July 2007.
30Lead bound in crystal glass as defined in Annex I (Category 1,2,3 and 4) of Council Directive 69/493/EEC