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|Section2= |Section3= |Section4= |Section5= |Section6= |Section7= |Section8= }} Octabromodiphenyl ether (octaBDE, octa-BDE, OBDE, octa, octabromodiphenyl oxide, OBDPO) is a brominated flame retardant which belongs to the group of polybrominated diphenyl ethers (PBDEs). ==Composition, uses, and production== Commercial octaBDE (also known as "Octabrom") is a technical mixture of different PBDE congeners having an average of 7.2 to 7.7 bromine atoms per molecule of diphenyl ether.〔United States Patent and Trademark Office. (Melting point enhancement of partially brominated diphenyl oxide mixtures. ) US Patent 5,000,879 issued on March 19, 1991.〕 The predominant congeners in commercial octaBDE are those of heptabromodiphenyl ether and octaBDE.〔〔Ad hoc working group on C-Octabromodiphenyl ether under the Persistent Organic Pollutants Review Committee of the Stockholm Convention. (Draft risk profile: commercial octabromodiphenyl ether. ) United Nations Environment Programme, August 2007.〕 The term octaBDE alone refers to isomers of octabromodiphenyl ether (PBDE congener numbers 194–205); the Infobox displays BDE-203 (2,2’,3,4,4’,5,5’,6-octabromodiphenyl ether).〔Agency for Toxic Substances and Disease Registry. (Toxicological Profile for Polybrominated Biphenyls and Polybrominated Diphenyl Ethers (PBBs and PBDEs). ) Atlanta, GA: U.S. Department of Health and Human Services, Public Health Service, September 2004.〕 Only congeners with more than 1% listed. OctaBDE is used in conjunction with antimony trioxide as a flame retardant in the housings of electrical and electronic equipment, mainly in the plastic acrylonitrile butadiene styrene, but also in high impact polystyrene, polybutylene terephthalate and polyamides.〔(European Union risk assessment report. Diphenyl ether, octabromo derivative. ) Luxembourg: Office for Official Publications of the European Communities, 2003. Publication EUR 20403 EN.〕 Typically 12–15% of the weight of the final product will consist of octaBDE.〔 The annual demand worldwide was estimated as 3,790 tonnes in 2001, of which Asia accounted for 1,500 tonnes, the Americas 1,500 tonnes, and Europe 610 tonnes.〔Bromine Science and Environmental Forum. (Major Brominated Flame Retardants Volume Estimates: Total Market Demand By Region in 2001. ) 21 January 2003.〕 The United Nations Environment Programme reports "Since 2004, it () is no longer produced in the EU, USA and the Pacific Rim and there is no information that indicates it is being produced in developing countries."〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Octabromodiphenyl ether」の詳細全文を読む スポンサード リンク
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