ROHS certification is an environmental certification, this test is mainly for electronic information products, so that it must not contain lead, mercury, cadmium, hexavalent chromium, polymeric brominated biphenyl ether and polymeric brominated biphenyls and other toxic and harmful substances.

January 27, 2003, the EU Parliament and the Council of the European Union passed the 2002/95/EC Directive, "Directive on the restriction of the use of certain hazardous substances in electrical and electronic equipment" (TheRestrictionoftheuseofCertainHazardousSubstancesinElectricalandElectronicEquipment), referred to as the RoHS directive. The basic content is that, with effect from July 1, 2006, six harmful substances, such as lead, mercury, cadmium, hexavalent chromium, polybrominated high temperature heat shrinkable tubes (PBB) and polybrominated two benzene ether (PBDE), have been restricted from the use of new electronic and electrical equipment products on the market. After the release of the RoHS directive, it became a formal law within the EU from February 13, 2003; Before August 13, 2004, EU Member States converted the laws/regulations of the country of cost; and on February 13, 2005, the European Commission re-examined the scope of the directive and considered the factors for the development of new technologies, Preparation of an increase in the list of banned substances; After July 1, 2006, the EU market will formally ban the sale of products with excess content in six categories of substances.

Metallic materials need to test four kinds of harmful metal elements such as (Cd cadmium/Pb lead/Hg Mercury/Cr6+ hexavalent chromium)

In addition to inspecting these four harmful heavy metal elements, the plastic material also needs to be tested for brominated flame retardants (polybrominated biphenyls PBB/polybrominated ether PBDE)

At the same time, the packaging materials of different materials also need to be tested for heavy metals in packaging materials (94/62/EEC)

The following are the upper limit concentrations of six harmful objects in RoHS:

Cadmium: Less than 100ppm

Lead: Less than 1000ppm (steel alloy small and medium 2500ppm aluminum alloy Small to 4000ppm copper alloy small to 40000ppm)

Mercury: Less than 1000ppm

Hexavalent chromium: Less than 1000ppm

Polybrominated biphenyls PBB: Less than 1000ppm

Polybrominated PBD ether: less than 1000ppm

Products specifically covered by RoHS

RoHS Electrical and electronic products that may contain the above six hazardous substances in all production processes and in raw materials.

ROHS对热缩管行业的认证标准

ROHS认证是环保认证,这个检测主要是针对电子信息产品，使其不得含有铅、汞、镉、六价铬、聚合溴化联苯乙醚和聚合溴化联苯及其他有毒有害物质。

2003年1月27日，欧盟议会和欧盟理事会通过了2002/95/EC指令，即“在电子电气设备中限制使用某些有害物质指令”（TheRestrictionoftheuseofCertainHazardousSubstancesinElectricalandElectronicEquipment），简称RoHS指令。基本内容是：从2006年7月1日起，在新投放市场的电子电气设备产品中，限制使用铅、汞、镉、六价铬、多溴联苯高温热缩管（PBB）和多溴二苯醚（PBDE）等六种有害物质。RoHS指令发布以后，从2003年2月13日起成为欧盟范围内的正式法律；2004年8月13日以前，欧盟成员国转换成本国法律/法规；2005年2月13日，欧盟委员会重新审核指令涵盖范围，并考虑新科技发展的因素，拟定禁用物质清单增加项目；2006年7月1日以后，欧盟市场上将正式禁止六类物质含量超标的产品进行销售。

金属材质需测试四种有害金属元素如（Cd镉/Pb铅/Hg汞/Cr6+六价铬）

塑胶材质除了检查这四种有害重金属元素外还需检测溴化阻燃剂（多溴联苯PBB/多溴联笨醚PBDE）

同时对不同材质的包装材料也需要分别进行包装材料重金属的测试（94/62/EEC）

以下是RoHS中对六种有害物规定的上限浓度：

镉：小于100ppm

铅：小于1000ppm（钢合金中小于2500ppm铝合金中小于4000ppm铜合金中小于40000ppm）

汞：小于1000ppm

六价铬：小于1000ppm

多溴联苯PBB：小于1000ppm

多溴联笨醚PBD：小于1000ppm

RoHS具体涉及的产品

RoHS针对所有生产过程中以及原材料中可能含有上述六种有害物质的电气电子产品