which limits their use in electrical and electronic products sold in the EU.

Classes of PBBs

The family of PBBs consists of 209 possible substances, which are called congeners (PBB = C₁₂H_(10-x)Br_x (x = 1, 2, ..., 10 = m + n)). The number of isomers for mono-, di-, tri-, tetra-, penta-, hexa-, hepta-, octa-, nona-, and decabromobiphenyl are 3, 12, 24, 42, 46, 42, 24, 12, 3 and 1, respectively.

Characteristics

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