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Toxic and hazardous substances testing in LEDs

日期: 2020-06-10

In the 21st century today, as the most environmental-friendly and energy saving light source, LED is replacing traditional light sources and becoming the protagonist of lighting appliances. In addition to energy conservation, environmental protection is also one of the key requirements of this century. Are the LED lights made of environmentally friendly materials? Are the materials hazardous to human health and environment? This is another major issue we are facing.


Restrictions of hazardous substances

a. EU RoHS Directive

b. California RoHS Regulations

c. US Federal RoHS Act


The above laws and regulations all regulate the content of the following six restricted substances in the various homogeneous materials used to make LED lamps:


Lead: 1000 ppm, cadmium: 100 ppm, mercury: 1000 ppm, hexavalent chromium: 1000 ppm, polybrominated biphenyl ethers: 1000 ppm


Four substances that EU RoHS recommends as priority substances


a. Three phthalates (BBP, DBP and DEHP)

b. Hexabromocyclododecane (HBCDD)


EU Regulations for the Registration, Assessment, Authorization and Restriction of Chemicals


 a. List of authorized candidate substances       144 Substances of Very High Concern (SVHCs)

 b. List of Restricted Substances, Annex XVII. Some related test items are listed below

. No. 1. polychlorinated terphenyls (PCTs)

. No. 20. organotin compounds

. No. 23. cadmium

. No. 42. short chain chlorinated paraffins

. No. 46. nonylphenols and nonylphenol ethoxy ethers

. No. 50. polycyclic aromatic hydrocarbons (PAHs)


EU Persistent Organic Pollutants Regulation

Some related test items are listed below

a. perfluorooctane sulfonic acid and its derivatives (PFOS)

b. polychlorinated biphenyls (PCBs)


18 PAHs requested by the GS certification


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