Halogenated Derivatives of Aromatic Hydrocarbons (NESOI)

Headings 290391 and 290392 cover specifically named compounds (chlorobenzene, dichlorobenzenes, hexachlorobenzene, DDT). Any halogenated aromatic hydrocarbon derivative not described by those named headings — and not classifiable in another specific Chapter 29 provision — falls to the NESOI heading 290399. Importers should work through the GRI classification rules and, where ambiguity exists, consider a CBP binding ruling to lock in the correct 10-digit line.

Many chemical intermediates in heading 290399 sourced from China are subject to Section 301 tariffs. The applicable rate and any product exclusions depend on the specific 10-digit HTS line and the current status of USTR exclusion lists, which have changed over time. Importers should verify the Section 301 status of their specific line at the time of entry and monitor USTR notices for exclusion opportunities or expirations.