Natural camphor (derived from camphor tree wood) and synthetic camphor may be classified under different tariff provisions depending on the applicable schedule. Importers should confirm the production method with the supplier and document it on entry, as the distinction can affect both the applicable HTS subheading and any relevant phytosanitary requirements for wood-derived extracts.

Bulk camphor intended for use as a pharmaceutical excipient or active ingredient in OTC drug products falls under FDA jurisdiction. Importers should ensure the material meets USP-grade specifications if it will enter the drug supply chain, and FDA may detain shipments that lack adequate documentation of intended use or purity.