A bromophenol is an organic compound consisting of hydroxyl groups and bromine atoms bonded to a benzene ring.
Monobromrophenols have three isomers because there is only one bromine atom that can occupy one of three ring positions on the phenol molecule; 2-bromophenol, for example, is the isomer that has a bromine atom in the ortho position.
Pentabromophenol, by contrast, has only one isomer because all five available ring positions on the phenol are fully brominated.
A series of studies have shown that bromophenols derived from brominated flame retardants (BFRs) in human environments are present in human blood and breast milk.
This was widely reported[2][3] and has raised questions about restricting the use of brominated flame retardants in the future.