Yes. Dithiocarbamate fungicides including mancozeb, maneb, zineb, and metiram — enumerated at 3808922400 — have been subject to EPA registration review actions. If EPA suspends or cancels a registration, shipments of that product become inadmissible. Importers should monitor EPA's registration status database and confirm the product's current standing before placing orders, as a cancelled registration cannot be remedied at the port of entry.

The US tariff schedule distinguishes fungicides containing any aromatic or modified-aromatic substance (3808921500) from those based on inorganic substances (3808923000) and from other non-aromatic organic fungicides. The classification turns on whether the formulation contains an aromatic ring structure in the active ingredient or carrier, not merely in an inert ingredient. When the chemistry is ambiguous, a CBP binding ruling or laboratory analysis may be needed to confirm the correct 10-digit line.