Brominated flame retardant

Many different BFRs are produced synthetically with widely varying chemical properties. There are several groups:Michael J. Dagani, Henry J. Barda, Theodore J. Benya, David C. Sanders: Bromine Compounds, Ullmann's Encyclopedia of Industrial Chemistry 2002, Wiley-VCH, Weinheim. {{doi|10.1002/14356007.a04_405}}

• Polybrominated diphenyl ethers (PBDEs): DecaBDE, OctaBDE (not manufactured anymore), PentaBDE (not manufactured anymore, the first BFR, commercialized in the 1950s)
• Polybrominated biphenyl (PBB), not manufactured anymore
• Brominated cyclohydrocarbons
• Other brominated flame retardants with different properties and mechanisms

Decabromodiphenyl ether (Deca-BDE or DeBDE) - In August 2012, the UK authorities proposed decabromodiphenyl ether (Deca-BDE or DeBDE) as a candidate for Authorisation under the EU‘s regulatory regime on chemicals, REACH. On 5 July 2013 ECHA withdrew Deca-BDE from its list of priority substances for Authorisation under REACH, therefore closing the public consultation. On 1 August 2014, ECHA submitted a restriction proposal for Deca-BDE. The agency is proposing a restriction on the manufacture, use and placing on the market of the substance and of mixtures and articles containing it. On 17 September 2014, ECHA submitted the restriction report which initiates a six months public consultation. On 9 February 2017, the European Commission adopted Regulation EU 2017/227. Article 1 of this regulation states that Regulation (EC) No 1907/2006 is amended to include a ban on the use of decaBDE in quantities greater than 0.1% by weight, effective from 2 March 2019. Products placed on the market prior to 2 March 2019 are exempt. Furthermore, the use decaBDE in aircraft is permissible until 2 March 2027.{{cite journal|last1=The European Commission|title=Commission Regulation (EU) 2017/227|journal=Official Journal of the European Union|date=9 February 2017|volume=L35|pages=6–9|url=http://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:32017R0227&from=EN|access-date=16 June 2017}}

Hexabromocyclododecane (HBCD or HBCDD) is a ring consisting of twelve carbon atoms with six bromine atoms tied to the ring. The commercially used HBCD is in fact a mixture of different isomers. HBCD is toxic to water-living organisms. The UNEP Stockholm Convention has listed HBCD for elimination, but allowing a temporary exemption for the use in polystyrene insulation foams in buildings.The final decision is available on the UNEP Stockholm Convention website here: {{cite web |url=http://chm.pops.int/Convention/ConferenceoftheParties(COP)/Decisions/tabid/208/Default.aspx |title=COP Decisions |access-date=2014-10-26 |url-status=live |archive-url=https://web.archive.org/web/20140925113855/http://chm.pops.int/Convention/ConferenceoftheParties%28COP%29/Decisions/tabid/208/Default.aspx |archive-date=2014-09-25 }}

Tetrabromobisphenol A (TBBPA or TBBP-A) is mainly used in printed circuit boards, as a reactive flame retardant. Since TBBPA is chemically bound to the resin of the printed circuit board, it is less easily released than the loosely applied mixtures in foams such that an EU risk assessment concluded in 2005 that TBBPA poses no risk to human health in that application.{{cite web |url=http://www.bsef.com/uploads/library/final_tbbpa_human_health_report.pdf |title=EU Risk Assessment Report of 2,2',6,6'-tetrabromo-4,4'-isopropylidenediphenol (tetrabromobisphenol-A or TBBP-A) Part II – human health |publisher=Institute for Health and Consumer Protection |access-date=2014-10-26 |url-status=dead |archive-url=https://web.archive.org/web/20140905000058/http://www.bsef.com/uploads/library/final_tbbpa_human_health_report.pdf |archive-date=2014-09-05 }} TBBPA is also used as an additive in acrylonitrile butadiene styrene (ABS).

Content of brominated flame retardants in different polymers:Pedro Arias (2001): Brominated flame retardants – an overview. The Second International Workshop on Brominated Flame Retardants, Stockholm

The electronics industry accounts for the greatest consumption of BFRs. In computers, BFRs are used in four main applications: in printed circuit boards,{{cite book |doi=10.1002/14356007.a11_123.pub2 |chapter=Flame Retardants |title=Ullmann's Encyclopedia of Industrial Chemistry |date=2021 |last1=Beard |first1=Adrian |last2=Battenberg |first2=Christian |last3=Sutker |first3=Burton J. |pages=1–26 |isbn=978-3-527-30385-4 }} in components such as connectors, in plastic covers, and in electrical cables. BFRs are also used in a multitude of products, including, but not exclusively, plastic covers of television sets, carpets, pillows, paints, upholstery, and domestic kitchen appliances.

{{main|Polybrominated diphenyl ethers#Health and environmental concerns}}

Generally, governments have determined that brominated fire retardants are not harmful to human health in the exposure amounts assessed.{{cite web |title=Public Health Statement for PBDEs |url=https://wwwn.cdc.gov/TSP/PHS/PHS.aspx?phsid=1449&toxid=183 |publisher=Agency for Toxic Substances and Disease Registry, US Centers for Diesease Control and Prevention |access-date=24 December 2024 |date=8 May 2017}}{{cite web |title=Polybrominated diphenyl ethers (PBDEs) - information sheet |url=https://www.canada.ca/en/health-canada/services/chemical-substances/fact-sheets/chemicals-glance/polybrominated-diphenyl-ethers-public-summary.html |publisher=Health Canada, Government of Canada |access-date=24 December 2024 |date=14 September 2023}} Ingestion of house dust accounts for 80-90% of total PBDE exposure, while the remaining exposure occurs from food ingestion. PBDE-contaminated foods, particularly those high in fat content, such as fatty meats or fish, are possible sources of exposure. In breastfeeding infants, breast milk may be an exposure source because PBDEs can be present in the mother and her milk. Various other food items may contain PBDEs, including meat, meat products, dairy products, fish and other seafood.{{cite journal |author=EFSA Panel on Contaminants in the Food Chain |title=Update of the risk assessment of polybrominated diphenyl ethers (PBDEs) in food |journal=EFSA Journal |date=24 January 2024 |volume=22 |issue=1 |page=e8497 |doi=10.2903/j.efsa.2024.8497 |url=https://efsa.onlinelibrary.wiley.com/doi/10.2903/j.efsa.2024.8497|pmc=10807361 }}

• Tris(2,3-dibromopropyl) phosphate

{{reflist}}

• {{cite journal

|author1=Kyle D'Silva, Alwyn Fernandes |author2=Martin Rose

|name-list-style=amp | title = Brominated Organic Micropollutants—Igniting the Flame Retardant Issue

| journal = Critical Reviews in Environmental Science and Technology

| year = 2004

| volume = 34

| issue = 2

| pages = 141–207

| doi = 10.1080/10643380490430672|s2cid=95008650

}}

• {{cite journal|last1=Law|first1=Robin J.|last2=Kohler|first2=Martin|last3=Heeb|first3=Norbert V.|last4=Gerecke|first4=Andreas C.|last5=Schmid|first5=Peter|last6=Voorspoels|first6=Stefan|last7=Covaci|first7=Adrian|last8=Becher|first8=Georg|last9=Janak|first9=Karel|title=Hexabromocyclododecane Challenges Scientists and Regulators|journal=Environmental Science & Technology|volume=39|pages=281A–287A|year=2005|doi=10.1021/es053302f|issue=13|pmid=16053062|bibcode=2005EnST...39..281L|doi-access=free}}
• {{cite journal

| author= Cynthia A. de Wit

| title = An overview of brominated flame retardants in the environment

| journal = Chemosphere

| year = 2002

| volume = 46

| issue = 5

| pages = 583–624

| doi = 10.1016/S0045-6535(01)00225-9

| pmid=11999784| bibcode = 2002Chmsp..46..583D

}}

• {{cite journal

| author= Young Ran Kim

| title = Health consequences of exposure to brominated flame retardants: A systematic review

| journal = Chemosphere

| year = 2014

| volume = 106

| issue =

| pages = 1–19

| doi = 10.1016/j.chemosphere.2013.12.064

| pmid=24529398|display-authors=etal| bibcode=2014Chmsp.106....1K| url = https://eprints.qut.edu.au/78631/3/78631.pdf

}}

• {{cite journal

|author1=H. Fromme |author2=G. Becher |author3=B. Hilger |author4=W. Völkel | year = 2016

| title = Brominated flame retardants – Exposure and risk assessment for the general population

| journal = International Journal of Hygiene and Environmental Health

| volume = 219

| issue = 1

| pages = 1–23

| doi = 10.1016/j.ijheh.2015.08.004

| pmid = 26412400

}}

• {{cite journal

| author1=J. de Boer | author2=H. M. Stapleton

| year = 2019

| title = Toward fire safety without chemical risk

| journal = Science

| volume = 364

| issue = 6437

| pages = 231–232

| doi = 10.1126/science.aax2054

| pmid = 31000649

| bibcode=2019Sci...364..231D

| hdl=1871.1/bb6014cc-f3d4-4f55-bf5f-26d48843889f

| s2cid=121618800

| url = https://www.science.org/doi/10.1126/science.aax2054 | url-access=subscription

| hdl-access = free

}}

• [http://www.mpi-chemie.com/category/brominated-flame-retardants.html MPI Milebrome - Brominated Flame Retardants]
• [http://www.bsef.com Bromine Science and Environmental Forum]
• [https://web.archive.org/web/20051227043918/http://www.ebfrip.org/ European Brominated Flame Retardant Industry Panel]
• SFT: [http://www.sft.no/publikasjoner/2462/ta2462.pdf Current State of Knowledge and Monitoring requirements: Emerging "new" Brominated flame retardants in flame retarded products and the environment]{{dead link|date=November 2016 |bot=InternetArchiveBot |fix-attempted=yes }}

Category:Bromine compounds

Category:Organobromides

Category:Flame retardants