Flame Retardants

Heptabromodiphenyl ether (heptaBDE)

By — 19-year firefighter and entrepreneur. Updated July 2026.
Heptabromodiphenyl ether (heptaBDE) — Embr Bedroom Chemistry Atlas

At a glance

Chemical familyPolybrominated diphenyl ether (PBDE) — an additive brominated flame retardant, not a discrete substance but the hepta-brominated fraction of commercial octabromodiphenyl ether
CAS number68928-80-3
Named congenersBDE-183 (CAS 207122-16-5) and BDE-175 (CAS 446255-22-7) are the hepta congeners named in the Stockholm listing; the listing also covers "other hexa- and heptabromodiphenyl ethers present in commercial octabromodiphenyl ether"
ClassificationStockholm Convention Annex A, listed 2009 by decision SC-4/14; prohibited in the EU under Annex I Part A of Regulation (EU) 2019/1021; prohibited in Canada and Great Britain, and reported prohibited in Australia on a primary instrument we could not open; in the US, a TSCA Significant New Use Rule rather than a ban. Not evaluated by IARC. Not on California Proposition 65
Where you encounter itLegacy hard plastics, chiefly the ABS housings of pre-2005 electronics and business machines, and articles moulded from recovered plastic. It is a settled-dust contaminant in ordinary homes rather than a product you can buy
Sleep micro environment relevanceIndirect. HeptaBDE was never a polyurethane-foam retardant, so it is not a bedding or mattress emission. BDE-183 was found in more than 88% of house-dust samples from 68 Zagreb homes, which makes the bedroom floor the relevant surface rather than the bed itself
Activated carbon captureNot the right tool. Hepta-brominated diphenyl ethers are heavy, low-volatility molecules that partition to dust and surfaces rather than to gas-phase air, so sorbent media aimed at vapours address the wrong compartment. Dust removal is the intervention that touches the actual route

Heptabromodiphenyl ether is not a molecule anyone set out to make. It is the hepta-brominated fraction of commercial octabromodiphenyl ether, an additive flame retardant blended into hard plastics, and it belongs to the wider family of polybrominated diphenyl ethers (PBDEs). The Stockholm Convention defines it as a group rather than a substance: BDE-175, BDE-183, and "other hexa- and heptabromodiphenyl ethers present in commercial octabromodiphenyl ether" (decision SC-4/14, 2009). The EU entry uses a different handle for the same thing, CAS 68928-80-3 "and others", which the US Federal Register spells out as "Benzene, 1,1'-oxybis-, heptabromo deriv." — a derivative class, not one isomer. Regulatory

That matters for anyone reading a test report. A laboratory result naming BDE-183 and a regulation naming CAS 68928-80-3 are talking about overlapping but not identical things, and PubChem, which many tools resolve through, silently maps this CAS onto a single congener structure (BDE-173). The listing is a group. Treat it as one.

Regulatory & certification status

Where heptabromodiphenyl ether stands across the major regulatory systems. Each row links to the governing instrument. Where a jurisdiction has no specific measure, or where we could not read the primary text ourselves, that is stated plainly rather than left blank.

European UnionBanned. Heptabromodiphenyl ether appears in Annex I, Part A of Regulation (EU) 2019/1021, the EU POPs Regulation, listed as CAS No "68928-80-3 and others" and EC No "273-031-2 and others". Manufacture, placing on the market and use are prohibited. Annex I Part A is a genuine prohibition, which is worth saying because two other EU lists are routinely mistaken for one: the REACH Candidate List identifies a substance without banning it, and a CLP harmonised classification assigns a hazard statement without banning it. The consolidated entry sets the Article 4(1)(b) unintentional-trace threshold at 10 mg/kg (0,001 % by weight) in substances, applies a combined tetra-, penta-, hexa-, hepta- and decaBDE limit of 10 mg/kg in mixtures and articles, and grants recovered material a stepped derogation: 500 mg/kg, falling to 350 mg/kg on 30 December 2025 and 200 mg/kg on 30 December 2027. Two further derogations cover electrical and electronic equipment within the scope of Directive 2011/65/EU, and articles already in use in the Union before 25 August 2010. Regulatory — EUR-Lex
EU harmonised classification (CLP)None. Annex VI of the CLP Regulation carries no entry for heptabromodiphenyl ether or for CAS 68928-80-3. Read that carefully: absence from Annex VI is not absence of hazard, because Annex VI covers only the harmonised subset and everything outside it rests on industry self-classification. The commercial mixture these congeners came out of does have an entry — index 602-094-00-4, "diphenylether; octabromo derivate", EC 251-087-9, CAS 32536-52-0, classified Repr. 1B, H360Df. Regulatory — ECHA, CLP Annex VI
United StatesNot banned. EPA regulates heptabromodiphenyl ether under TSCA through the Significant New Use Rule codified at 40 CFR 721.10000, finalised in the Federal Register of 13 June 2006 (vol. 71, no. 113), which names "heptabromodiphenyl ether (CAS No. 68928-80-3; Benzene, 1,1'-oxybis-, heptabromo deriv.)" and requires notice to EPA at least 90 days before manufacture or import for any use on or after 1 January 2005. It is not on California Proposition 65: the only PBDE entry on the OEHHA list is "pentabromodiphenyl ether mixture [DE-71 (technical grade)]", listed for cancer on 7 July 2017. It is not in the 15th Report on Carcinogens; the NTP's brominated listing is polybrominated biphenyls, a different chemical class. EPA publishes no reference dose or reference concentration for it, while BDE-47 and BDE-99 each carry an IRIS oral RfD of 1×10⁻⁴ mg/kg-day. Regulatory — Federal Register
CanadaProhibited, by formula rather than by name. PBDEs are a CEPA-toxic substance, and the Prohibition of Certain Toxic Substances Regulations, 2025 (SOR/2025-270, Canada Gazette Part II, 31 December 2025) define them in Schedule 1, item 14 as "Polybrominated diphenyl ethers that have the molecular formula C12H(10-n)BrnO in which 4≤n≤10". HeptaBDE is the n=7 case, so it is captured by the group definition without being named individually. Section 5(1) states that "a person must not manufacture, use, sell or import a prohibited toxic substance set out in column 1 of Schedule 1 or a product containing that substance, unless the toxic substance is incidentally present." Schedule 3 sets incidental-presence limits of 1,000 mg/kg for certain electrical and electronic equipment, 500 mg/kg for other manufactured items, and 10 mg/kg per congener for commercial-grade substances. The 2036 authorisation for motor-vehicle replacement parts applies to decaBDE only and does not reach heptaBDE. The regulations replace the 2012 version and came into force on 30 June 2026. Regulatory — Justice Laws
AustraliaProhibited, per the IChEMS Register. The Australian Government maintains a single Industrial Chemicals Environmental Management Standard register entry covering octabromodiphenyl ether, heptabromodiphenyl ether and hexabromodiphenyl ether together, scheduling them to Schedule 7 — the tier for chemicals likely to cause serious or irreversible environmental harm with no essential uses — and prohibiting import, manufacture, use and export with narrow derogations for unintentional trace contamination, laboratory research and reference standards, disposal, and articles already in use. One caveat we will not paper over: we could not open the primary instrument in this review, because legislation.gov.au returns a JavaScript shell to scripted clients and the department's own site timed out. The Schedule number and the reported commencement date of 1 July 2024 come from regulatory-tracking reporting rather than from the instrument itself. Inferred — prohibition and scheduling reported by regulatory trackers; primary instrument text not read
United KingdomProhibited in Great Britain. Regulation (EU) 2019/1021 was retained in GB law, and the retained Annex I still carries the entry "Heptabromodiphenyl ether", CAS No "68928-80-3 and others", EC No "273-031-2 and others" — confirmed on legislation.gov.uk, where the GB text substitutes "appropriate authority" for the EU wording in the concentration-threshold provision. It has been amended by a series of instruments including the Persistent Organic Pollutants (Amendment) (EU Exit) Regulations 2020 and the Persistent Organic Pollutants (Amendment) Regulations 2025. Northern Ireland continues to apply the EU Regulation directly. Regulatory — UK legislation
InternationalListed in Annex A (elimination) of the Stockholm Convention in 2009 at COP-4, by decision SC-4/14, jointly with hexabromodiphenyl ether. Production carries no exemption. Use carries one specific exemption, for "Articles in accordance with provisions of part IV of this Annex", and Part IV is the recycling clause: a Party may allow the recycling of articles that contain or may contain these substances, and the use and final disposal of articles made from that recycled material, provided the recycling is environmentally sound and does not recover the substances for reuse. IARC has never evaluated heptabromodiphenyl ether, commercial octabromodiphenyl ether, or PBDEs as a class, so there is no cancer classification to report either way. Regulatory — Stockholm Convention, decision SC-4/14
Food-safety assessmentEFSA's 2024 update on PBDEs in food assessed ten congeners, BDE-183 among them, and could derive a Reference Point for only four (BDE-47, BDE-99, BDE-153 and BDE-209). For the remaining six, the Panel reported that no studies were available to identify Reference Points. The hepta congener's toxicological base is materially thinner than that of the foam congeners. Regulatory — EFSA Journal
The 72-hour test windowMissed entirely, and for a reason that makes the test the wrong instrument rather than a failed one. Hepta-brominated diphenyl ethers are heavy, low-volatility additives blended into hard plastic; they migrate and shed into settled dust rather than off-gassing, so a short chamber test built to capture volatile organic compounds will not see them. Inferred — from the compound's volatility and dust-partitioning behaviour versus the VOC focus of short chamber tests

What it is

Commercial octabromodiphenyl ether was never one chemical. It was a blend, sold under names like DE-79 and Bromkal 79-8DE, and its bromination sat on a spectrum. La Guardia and colleagues took the penta-, octa- and deca-BDE technical products apart congener by congener and reported hepta-brominated components including BDE-171 and BDE-180 present above 0.02% by weight. HeptaBDE entered buildings as a fraction of a commercial product, never as a pure substance in its own right. Peer-reviewed

The octa mixture was an additive retardant for hard plastics, above all the ABS used in electronics and business-machine housings. Additive means it was blended in, not chemically bonded, so it can leave the polymer that carries it. Regulators eventually stopped chasing the mixture and started listing the fractions: the Stockholm Convention took the hexa and hepta congeners in 2009, and the EU carried them into Annex I of its POPs Regulation.

Where it shows up

Not in your bed. The PBDEs that went into polyurethane foam were the penta-mix congeners BDE-47, BDE-99 and BDE-100, each of which has its own page here. A mattress bought today contains no heptabromodiphenyl ether, and a mattress bought in 2002 almost certainly did not either. Anyone selling you a bed on the strength of this compound is selling you something else.

What does put it in a bedroom is settled dust. Klinčić and colleagues sampled house dust from 68 Zagreb homes and found BDE-183, the dominant hepta congener, in more than 88% of samples, making it one of the two most frequently detected PBDEs in the study alongside BDE-99. The plausible reservoirs in an ordinary home are old plastic-cased equipment, articles degrading slowly in place, and plastics moulded from recovered material. Peer-reviewed

That last reservoir is the one people miss. Both the Stockholm listing and the EU Annex I entry expressly permit the recycling of articles containing these substances, which keeps a slow return path open into new household goods. The EU's limit for the sum of BDEs in recovered material was 500 mg/kg, dropped to 350 mg/kg at the end of 2025, and reaches 200 mg/kg on 30 December 2027. A ban with a recycling clause is a ban on making the stuff, not on encountering it.

What the research says

Two findings pull in opposite directions, and holding both is the honest position.

Measured indoors, the compound is leaving. Ma and colleagues compared brominated flame retardants in Birmingham homes against earlier work in the same city and reported significant declines in legacy retardants, the tri- to hepta-BDEs among them, alongside significant increases in the newer replacement retardants over the same decade. Treated stock ages out of homes, and the dust follows. Peer-reviewed

Measured in people, it is not leaving on the same schedule. Zhong and colleagues pooled the historical measurement record for PBDEs and found that the lower-brominated congeners turned downward decades ago, while for BDE-183 no decreasing trend over time was evident in human milk anywhere except the EU. The treaty bent the curve for the foam congeners. For this one, outside Europe, it has not yet. Peer-reviewed

Neither finding tells you whether the amount in any particular home matters, and that is not a gap we can close by writing more confidently. No inhalation reference value exists for heptabromodiphenyl ether. The EPA Regional Screening Level table that feeds this site's dose spoke carries no toxicity value of any kind for it, oral or inhalation, while BDE-47 and BDE-99 each carry an IRIS oral RfD. EFSA reached the same wall from the food side in 2024: of the ten PBDE congeners it assessed, BDE-183 was among the six for which no studies were available to identify Reference Points. A concentration in dust cannot be converted into a dose statement when no dose statement exists to convert it into. Regulatory

The route in, and why it decides everything else

Hepta-brominated diphenyl ethers are heavy and barely volatile. They partition to dust and surfaces instead of to the air, which makes the intake route dust ingestion and hand-to-mouth contact rather than breathing. Almost every practical decision on this page follows from that one physical fact: floor and surface cleaning touches the actual exposure pathway, and an air filter mostly does not. Inferred — from the compound's physical chemistry and the dust-dominated exposure route, not from a measured intervention trial

What helps

Damp-mop hard floors and vacuum with a sealed HEPA machine, including under and behind the bed. Settled dust is the exposure route for this compound, so removing dust is the intervention that lands on it. Dry sweeping mostly relocates the problem.

Wash hands before eating and before bed, and wash children's hands more often than feels necessary. Hand-to-mouth transfer of house dust is the dominant intake path for young children.

Move pre-2005 plastic-cased electronics out of the bedroom. CRT televisions, old printers and computer housings are the plausible reservoir, because commercial octaBDE went into hard plastics. Bedding is not the thing to change here.

When furniture or electronics are being replaced anyway, choose products certified free of halogenated flame retardants. The UK measurement record shows legacy brominated retardants declining as treated stock leaves homes, so turnover is what actually moves the number. This is an argument for patience rather than for a shopping trip.

Ventilate and vacuum during and after any renovation that disturbs old plastics or wiring, when reservoir dust is most likely to be stirred up and redistributed.

What does not help

  • Replacing the mattress. HeptaBDE was never a polyurethane-foam flame retardant. It went into hard plastics, so a new bed changes nothing about this particular compound.
  • An air purifier on its own. These molecules are heavy and low-volatility and partition to dust and surfaces rather than to gas-phase air, so a filter running without dust removal and source control is aimed at the wrong compartment. Inferred — reasoning from the compound's physical chemistry and dust-dominated exposure route, not from a measured filter trial
  • "Detox" supplements, binder products or sauna protocols. No evidence shows any of them shifts PBDE body burden, and the biomonitoring record has the higher-brominated congeners falling slowly or not at all regardless of what individuals do.
  • Assuming the prohibition settled the matter. Stockholm and the EU Annex I entry both carry a recycling allowance for articles, and the EU's recovered-material limit for the sum of BDEs stands at 350 mg/kg until 30 December 2027.
  • Reading "no harmonised EU classification" as reassurance. CLP Annex VI has no entry for heptabromodiphenyl ether, but Annex VI covers only the harmonised subset, and the commercial octaBDE mixture these congeners came from is classified there as Repr. 1B, H360Df.

Open research questions

  • No inhalation reference value exists, and no oral one either. The EPA Regional Screening Level table that feeds this site's dose spoke carries no toxicity value of any kind for heptabromodiphenyl ether, while BDE-47 and BDE-99 both hold an IRIS oral RfD of 1×10⁻⁴ mg/kg-day. Presence in dust therefore cannot be turned into a dose statement. Regulatory — absence verified against the RSL summary table
  • EFSA derived Reference Points for only four of the ten PBDE congeners it assessed in 2024, and BDE-183 was among the six for which no studies were available. Filling that gap needs new toxicology, not new modelling. Regulatory
  • No measured sleeping-environment or breathing-zone concentration of hepta-BDE congeners appears in the Embr Exposure Ledger. Every measurement we hold is bulk floor dust, not the air or dust in the 30 cm above a pillow. Speculation — the sleeping-zone measurement has not been made
  • Whether the EU's recovered-material derogation returns meaningful quantities of heptaBDE to new household goods has not, as far as we could find, been tested by a European home-dust study designed to answer that question. Speculation — the recycling pathway is written into law; its measured contribution to indoor dust is unquantified
  • Australia's IChEMS Schedule 7 designation and its reported commencement of 1 July 2024 could not be read from the primary instrument during this review. Confirm both against the instrument before relying on that row. Inferred — sourced from regulatory tracking, not from the legislation itself

The exposure ledger for Heptabromodiphenyl ether

One chemical, several public questions, answered from independent datasets and joined here — the environment it shows up in, the body burden it carries, how it is regulated, and what actually reduces it.

This compound appears in 1 of our 10 exposure datasets.
At what level would it matter?
This compound does not appear in EPA’s consolidated screening-level table at all, so no published inhalation reference value exists to set against the findings on this page. That is common for newer substances and for replacements brought in after an older compound was restricted. What this page documents is that the compound is present, not how much of it would matter. Presence is not dose.Source: US EPA, Regional Screening Levels (RSL) Summary Table
Does the law flag it?
Banned in the EU under the persistent organic pollutants Regulation: manufacture, sale and use are prohibited. Specific exemptions apply.Source: California OEHHA Prop 65 listSource: EU POPs Regulation

Detection and body-burden figures are occurrence data, not a personal measurement or a health diagnosis. Part of the Embr Exposure Ledger — an open, cross-dataset chemical join (download the data), reusable with attribution.

Where you meet Heptabromodiphenyl Ether across your home

The same compound turns up in more than one place you live. Here's where it shows up in Embr — each links to the full breakdown for that part of your home.

Citations

  1. Conference of the Parties to the Stockholm Convention on Persistent Organic Pollutants (2009). "Decision SC-4/14: Listing of hexabromodiphenyl ether and heptabromodiphenyl ether," in Report of the Conference of the Parties to the Stockholm Convention on Persistent Organic Pollutants on the work of its fourth meeting (UNEP/POPS/COP.4/38). United Nations Environment Programme. chm.pops.int (PDF) Regulatory
  2. European Parliament and Council of the European Union (2019). Regulation (EU) 2019/1021 on persistent organic pollutants (recast) — Annex I, Part A, entry "Heptabromodiphenyl ether"; consolidated text 02019R1021-20260101. Official Journal of the European Union. EUR-Lex Regulatory
  3. US Environmental Protection Agency, Office of Pollution Prevention and Toxics (2006). "Certain Polybrominated Diphenylethers; Significant New Use Rule" (final rule), 40 CFR Part 721 [EPA-HQ-OPPT-2004-0085; FRL-7743-2]. Federal Register, vol. 71 no. 113, 13 June 2006. govinfo.gov Regulatory
  4. La Guardia MJ, Hale RC, Harvey E (2006). "Detailed polybrominated diphenyl ether (PBDE) congener composition of the widely used penta-, octa-, and deca-PBDE technical flame-retardant mixtures." Environmental Science & Technology, 40. DOI 10.1021/es060630m (PMID 17120549) Peer-reviewed
  5. Klinčić D, Tariba Lovaković B, Jagić K, Dvoršćak M (2021). "Polybrominated diphenyl ethers and the multi-element profile of house dust in Croatia: Indoor sources, influencing factors of their accumulation and health risk assessment for humans." Science of the Total Environment, 800. DOI 10.1016/j.scitotenv.2021.149430 (PMID 34399331) Peer-reviewed
  6. Zhong G, Li Z, Jones KC, Zhu Y (2025). "Effects of global treaties on commercial chemicals widely used as additives: a meta-analysis of historical measurements of polybrominated diphenyl ethers." The Lancet Planetary Health, 9. DOI 10.1016/s2542-5196(25)00114-7 (PMID 40516544) Peer-reviewed
  7. Ma Y, Stubbings WA, Jin J, Cline-Cole R, Abdallah MA, Harrad S (2024). "Impact of Legislation on Brominated Flame Retardant Concentrations in UK Indoor and Outdoor Environments: Evidence for Declining Indoor Emissions of Some Legacy BFRs." Environmental Science & Technology, 58. DOI 10.1021/acs.est.3c05286 (PMID 38386008) Peer-reviewed
  8. EFSA Panel on Contaminants in the Food Chain (CONTAM) (2024). "Update of the risk assessment of polybrominated diphenyl ethers (PBDEs) in food." EFSA Journal, 22. DOI 10.2903/j.efsa.2024.8497 (PMID 38269035) Regulatory

Frequently asked questions

  • Is heptabromodiphenyl ether in my mattress?

    No. The commercial product these congeners came out of, octabromodiphenyl ether, was an additive flame retardant for hard plastics, principally the ABS used in electronics and business-machine housings. The PBDEs that went into polyurethane foam were the penta-mix congeners BDE-47, BDE-99 and BDE-100. A mattress bought today contains no heptabromodiphenyl ether, and a mattress bought in 2002 almost certainly did not either.

  • Is heptabromodiphenyl ether banned?

    Yes, in several jurisdictions, and the word banned is precise here. Regulation (EU) 2019/1021 lists heptabromodiphenyl ether in Annex I Part A, which prohibits manufacture, placing on the market and use subject to the exemptions the Annex records. It was listed in Annex A of the Stockholm Convention in 2009 by decision SC-4/14, with no exemption for production. Canada and Great Britain prohibit it too, and Australia is reported to have scheduled it for prohibition, though we could not open the Australian instrument to confirm. In the United States there is no ban: EPA instead requires 90 days' notice before any new manufacture or import under the Significant New Use Rule at 40 CFR 721.10000.

  • If it is banned, why is it still in house dust?

    Because the treated articles are still in homes and the ban does not reach them. Klinčić and colleagues found BDE-183, the dominant hepta congener, in more than 88% of dust samples from 68 Zagreb homes, making it one of the two most frequently detected PBDEs in the study. Both the Stockholm listing and the EU Annex I entry expressly allow recycling of articles that contain these substances, and the EU limit for the sum of BDEs in recovered material only steps down to 200 mg/kg on 30 December 2027.

  • What actually reduces exposure to it?

    Dust removal, not air cleaning. Hepta-brominated diphenyl ethers are heavy, low-volatility molecules that partition to dust and surfaces, so the intake route is dust ingestion and hand-to-mouth contact rather than breathing. Damp-mop hard floors, vacuum with a sealed HEPA machine including under the bed, wash hands before eating, and move pre-2005 plastic-cased electronics out of the bedroom.

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Embr is a sleep environment company researching and addressing the chemistry of the bedroom. Our work focuses on capture at the sleep-surface interface under body-heat conditions — work that is in active research and product development.

Last reviewed 2026-07-25. If you find a factual error, contact us.