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HSChapter 29
Hexabromobiphenyls (HBBs) are polybrominated biphenyl flame retardants listed under the Stockholm Convention Annex A, effectively prohibiting their production and trade among signatory nations. The single US tariff line 2903940000 covers all hexabromobiphenyl isomers, and any import would face EPA TSCA review and potential inadmissibility. Trade professionals encountering this heading in legacy shipments or waste streams should be aware that even trace contamination in recycled materials can trigger regulatory obligations.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Despite both being brominated flame retardants, they are chemically distinct: hexabromobiphenyls (HBBs) have a biphenyl (two-ring aromatic) backbone and classify under 2903940000, while hexabromocyclododecane (HBCD) has an alicyclic ring structure and classifies under heading 2903.89. Both are Stockholm Convention-listed POPs, but they fall under different HTS headings, carry different CAS numbers, and may have different exemption pathways — so precise chemical identification is critical before filing entry.
Yes. HBBs were used in plastics and textiles before their phase-out, and recycled or vintage materials may contain residual concentrations. If a finished article or recycled feedstock contains HBBs above threshold levels, it may be subject to TSCA reporting or import restrictions. Importers of recycled polymers or secondhand textiles from regions where HBBs were historically used should conduct due diligence testing.
Monthly import values over time
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HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2903940000 | HALGNTED DRVTVS ARMTIC HYDRCRBS,HEXABROMOBIPHENYLS | $4K |
NUCLEIC ACIDS & SALTS; OTHER HETEROCYCLIC CMP, NES
HS 293499
POLYPEPTIDE PROTEIN& GLYCOPROTEIN HORMONES &DERIV
HS 293719
CMPDS CONT AN UNFUSED PYRIDINE RING ETC NESOI
HS 293339
BENZENE
HS 290220
HETEROCYCLIC COMP W NITROGEN HETERO-ATM ONLY NESOI
HS 293399
HETEROCYCLIC COMP WITH UNFUSED PYRAZOLE RING NESOI
HS 293319
| Country | Imports | Exports | Balance |
|---|---|---|---|
| GERMANY | -- | -- | -- |
| MEXICO | -- | -- | -- |
| KOREA, SOUTH | -- | -- | -- |
| CHINA | -- | -- | -- |
No geographic breakdown available
U.S. trade for this product is not broken down by state or port in the latest Census Bureau release.