Baby Safety / Compounds / BDE-99 (2,2',4,4',5-pentabromodiphenyl ether)

Is BDE-99 (2,2',4,4',5-pentabromodiphenyl ether) safe for babies and kids?

High risk for kids

Infants are more vulnerable to BDE-99 (2,2',4,4',5-pentabromodiphenyl ether) than children or adults due to immature hepatic/renal clearance, higher intake-to-body-weight ratio, rapid organ development, and increased gastrointestinal absorption.

What is bde-99 (2,2',4,4',5-pentabromodiphenyl ether)?

The IUPAC name is 1,2,4-tribromo-5-(2,4-dibromophenoxy)benzene.

Also known as: 1,2,4-tribromo-5-(2,4-dibromophenoxy)benzene, 2,2',4,4',5-Pentabromodiphenyl ether, BDE 99, D3A2T91I1E.

IUPAC name
1,2,4-tribromo-5-(2,4-dibromophenoxy)benzene
CAS number
60348-60-9
Molecular formula
C12H5Br5O
Molecular weight
564.7 g/mol
SMILES
C1=CC(=C(C=C1Br)Br)OC2=CC(=C(C=C2Br)Br)Br
PubChem CID
36159

Risk for babies

High risk

Infants are more vulnerable to BDE-99 (2,2',4,4',5-pentabromodiphenyl ether) than children or adults due to immature hepatic/renal clearance, higher intake-to-body-weight ratio, rapid organ development, and increased gastrointestinal absorption.

Neonates and infants up to 12 months have incomplete blood-brain barrier development, immature Phase I/II metabolic enzymes (particularly CYP3A4, UGT1A1), and higher gastrointestinal permeability. Equivalent doses produce higher internal concentrations and longer residence times.

What to do: Minimize infant exposure through source control. For breastfeeding mothers: reduce maternal exposure. For formula-fed infants: use certified low-migration bottles and verified water sources. Consult pediatrician regarding any concerns.

Risk for pregnant and nursing people

Elevated risk

Pregnancy alters the metabolism and distribution of BDE-99 (2,2',4,4',5-pentabromodiphenyl ether), potentially increasing fetal exposure. The developing embryo/fetus is vulnerable during organogenesis (weeks 3-8) and neurological development. Placental transfer should be assumed.

Suspected reproductive toxicant (GHS H361) or suspected endocrine disruptor. Precautionary approach warranted. Animal studies or limited human data suggest developmental toxicity potential.

What to do: Minimize exposure during pregnancy and lactation. Consult healthcare provider regarding specific risks. Consider alternative products with lower hazard profiles.

Regulatory consensus

3 regulatory and scientific bodies have classified BDE-99 (2,2',4,4',5-pentabromodiphenyl ether). The classifications differ — that's the data.

AgencyYearClassificationNotes
EPA CTX / IRIS—Inadequate information to assess carcinogenic potential
EPA CTX / Genetox—Genotoxicity: negative (Ames: negative, 0 positive / 1 negative reports)
EPA CTX / Genetox—Genotoxicity: negative (Ames: negative, 0 positive / 1 negative reports)

Regulators apply different standards of evidence — animal-data weighting, exposure-pattern assumptions, epidemiological power thresholds — which is why two scientific bodies can review the same data and reach different conclusions. The disagreement is the data.

Where kids encounter bde-99 (2,2',4,4',5-pentabromodiphenyl ether)

  • Industrial Facilities — Manufacturing plants, Chemical storage areas, Waste treatment sites
  • Occupational Environments — Factories, Warehouses, Transportation vehicles

Safer alternatives

Lower-risk approaches that achieve a similar outcome to BDE-99 (2,2',4,4',5-pentabromodiphenyl ether):

  • Inherently flame-resistant materials (wool, modacrylic, Nomex)
    Trade-offs: Higher material cost. Limited color/texture options.
    Relative cost: 1.2-2×
  • Barrier fabric technology
    Trade-offs: Adds manufacturing step and cost
    Relative cost: 1.2-2×

Frequently asked questions

Is bde-99 (2,2',4,4',5-pentabromodiphenyl ether) safe for kids?

Infants are more vulnerable to BDE-99 (2,2',4,4',5-pentabromodiphenyl ether) than children or adults due to immature hepatic/renal clearance, higher intake-to-body-weight ratio, rapid organ development, and increased gastrointestinal absorption.

What products contain bde-99 (2,2',4,4',5-pentabromodiphenyl ether)?

BDE-99 (2,2',4,4',5-pentabromodiphenyl ether) appears in: Manufacturing plants (Industrial facilities); Chemical storage areas (Industrial facilities); Factories (Occupational environments); Warehouses (Occupational environments).

What should I do if my child is exposed to bde-99 (2,2',4,4',5-pentabromodiphenyl ether)?

Minimize infant exposure through source control. For breastfeeding mothers: reduce maternal exposure. For formula-fed infants: use certified low-migration bottles and verified water sources. Consult pediatrician regarding any concerns.

Why do regulators disagree about bde-99 (2,2',4,4',5-pentabromodiphenyl ether)?

BDE-99 (2,2',4,4',5-pentabromodiphenyl ether) has been classified by 3 agencies including EPA CTX / IRIS, EPA CTX / Genetox, EPA CTX / Genetox, with differing conclusions. Regulators apply different standards of evidence (animal data weighting, exposure-pattern assumptions, epidemiological power thresholds), which is why two scientific bodies can review the same data and reach different conclusions. See the regulatory consensus table on this page for the full picture.

See BDE-99 (2,2',4,4',5-pentabromodiphenyl ether) in the baby app

Look up products containing bde-99 (2,2',4,4',5-pentabromodiphenyl ether), compare to alternatives, and explore the full data record.

Open in baby View raw API data

Sources (2)
  1. IARC Monographs Volume 107: Some Chemicals Used as Solvents and in Polymer Manufacture — Tetrabromobisphenol A (TBBPA) Group 2B; Polybrominated diphenyl ethers and hexabromocyclododecane evaluated as persistent halogenated flame retardants (2016) (2016) — regulatory
  2. US EPA: Contaminant Candidate List 5 (CCL5) — Final List of Unregulated Contaminants for Regulatory Evaluation under SDWA (2022); includes nickel, cobalt, vanadium, PFAS, and 97 additional chemical and microbial contaminants (2022) — regulatory

Reference data, not professional advice. Aggregates publicly available regulatory and scientific data; not a substitute for veterinary, medical, legal, or regulatory advice. Why we built ALETHEIA →