Octabromodiphenyl ether
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| Names | |
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| Other names
OctaBDE, Octa-BDE
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| Identifiers | |
| ChemSpider |
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| ECHA InfoCard | 100.046.428 |
| Properties | |
| C12H2Br8O | |
| Molar mass | 801.38 g/mol |
| Appearance | white solid |
| Density | 2.9 g/cm3 |
| not soluble | |
| Hazards | |
| R-phrases | R61, R62 |
| S-phrases | S53, S45 |
| Related compounds | |
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Related polybrominated diphenyl ethers
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Decabromodiphenyl ether, Pentabromodiphenyl ether |
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Related compounds
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diphenyl ether |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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 (what is   ?) |
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| Infobox references | |
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).
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. The predominant congeners in commercial octaBDE are those of heptabromodiphenyl ether and octaBDE. 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).
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. 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. The United Nations Environment Programme reports "Since 2004, it [octaBDE] 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."
OctaBDE is released by different processes into the environment, such as emissions from the manufacture of octaBDE-containing products and from the products themselves. Elevated concentrations can be found in air, water, soil, food, sediment, sludge, and dust.
In the environment, "photolysis, anaerobic degradation and metabolism in biota" can cause debromination of octaBDE, which produces PBDEs with fewer bromine atoms "which may have higher toxicity and bioaccumulation potential."
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Wikipedia