HBCD is one of the major brominated flame retardants (BFRs) used today. The major concerns about HBCD are its persistence and its potential for bioaccumulation. It is found in high concentrations in both animals and nature. There are indications of toxicological effects of HBCD in the liver and in the thyroid gland. HBCD can be metabolized and transformed into isomers of HBCD that are more bioaccumulative than the commercial technical mixture of HBCD. HBCD has recently been restricted for use in the EU by the European Chemicals Agency (ECHA) and it is currently proposed to be reviewed for a global agreement of restriction by the Stockholm Convention on Persistent Organic Pollutants (POPs).
Should the production and use of HBCD be banned worldwide?
Are there alternative compounds that can be used instead?

Of course it should be banned..
being a toxic one and having side effects it has to be.

Link: endocrine system