DecaBDE, short for decabromodiphenyl ether

The flame retardant decabromodiphenyl ether (C12Br10O) is often addressed by its short name decaBDE, sometimes spelled deca-BDE. It is also encoded as BDE-209. Other names are bis(pentabromophenyl)ether and its IUPAC name:
2,3,4,5,6-pentabromo-1-(2,3,4,5,6-pentabromophenoxy)benzene.

DecaBDE is a perbrominated aromatic ether compound. Based on studies exposing the risks for human health and the environment due to decaBDE's potential for bioaccumulation and degradation into toxic products, three companies are now phasing out the production of this chemical [1,2]. Alternatives have been evaluated [3].

Identifiers for decabromodiphenyl ether:
CAS Registry Number: 1163-19-5
EINECS Number: 214-604-9
RTECS Number: KN352500
Beilstein Number: 2188438

Decabromodiphenyl ether in other languages:
French: oxyde de bis(pentabromophényle)
German: Bis(pentabromphenyl)ether
Spanish: bis(pentabromofenil)éter

References
[1] Glenn Hess: Industry Drops Flame Retardant. Chemical & Engineering News January 4, 2010, 88 (1), page 10.
[2] DecaBDE Study: A Review of Available Scientific Research. Illinois Environmental Protection Agency. HTML.
[3] Report on Alternatives to the Flame Retardant DecaBDE: Evaluation of Toxicity, Availability, Affordability, and Fire Safety Issues. Illinois Environmental Protection Agency, March 2007. PDF.