FD&C Red 40, Yellow 5, and Yellow 6 are chemically acid dyes — their classification in heading 3204.12 is based on chemical structure and dye class, not end use. When these substances are imported for food, drug, or cosmetic applications, they are additionally subject to FDA batch certification requirements. The HTS classification does not change based on intended use, but the regulatory compliance pathway differs significantly depending on the downstream application.

FD&C color additives must be batch-certified by FDA before use in food, drugs, or cosmetics in the US. Importers should ensure that shipments are accompanied by documentation supporting FDA certification eligibility and should be prepared for FDA examination at the port of entry. Admissibility for food-use colorants is complex — consult a licensed customs broker and FDA regulatory counsel to confirm the required pre-import steps.