RoHS Restricted Substances

Analytical testing dots RoHS Restricted Substances

ALS Environmental has developed advanced analytical methodologies for RoHS/WEEE compliance testing. We offer a comprehensive analysis package to comply with RoHS/WEEE regulatory requirements. The procedures in place at ALS Environmental assure valid results are produced by applying specialized sample preparation techniques prior to analysis by the appropriate instrumental method.


RoHS/WEEE compliance is required of products imported to countries belonging to the European Union (EU).

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Polybrominated Diphenyl Ethers (PBDEs)

Polybrominated Diphenyl EthersPBDEs are a class of compounds in which bromine atoms are attached to the diphenyl ether molecule. There are 209 possible PBDE compounds, which individually are known as congeners. The target list at ALS Environmental is based upon the environmentally significant and lipophilic congeners. The target list is derived from the primary components of the major products currently in use.

PBDEs have been found in every sector of the environment, with particularly high levels in North America. PBDEs have been detected in sediments, sewage, sludge, crops, meat, dairy products, fish, chicken eggs, mammals, human breast milk, and human blood. Levels in North America have been in the range of 10-100 times higher than in Europe, where the government is taking action to reduce exposure. Some studies indicate that levels of PBDEs in breast milk of North American women are doubling every two to five years.

There is growing evidence that these chemicals may cause developmental, immune and endocrine effects.

Learn more about the ALS Environmental approach for PBDE compliance testing...

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Polybrominated Biphenyls (PBBs)

Polybrominated BiphenylsPBBs are a class of compounds in which bromine is attached to a biphenyl ring. There are 209 possible PBB compounds; individually they are known as congeners. PBBs are structurally similar to Polychlorinated Biphenyls (PCBs), which are currently regulated by the EPA.

PBBs are a class of organic compounds used as flame-retardants. PBBs are chemically inert and therefore persistent in the environment. The stability of these chemical compounds and their hydrophobic nature leads to bioaccumulation in the environment. In the United States, the manufacture of PBBs was banned in 1976. Although these compounds are no longer manufactured, they are present in the environment due to their chemical stability.

PBBs can cause weight loss, skin disorders, nervous and immune systems effects, and effects on the liver, kidneys, and thyroid gland. PBBs are also reasonably anticipated to be carcinogens.

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Heavy Metals (Hexavalent Chromium, Lead, Cadmium, Mercury)

Diagram of lead with electron shellThe toxic effects of heavy metals are well documented, particularly for Hexavalent Chromium, Lead, Cadmium, Mercury, and associated compounds.

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