Ascorbic Acid Lactone from Mexico
Ascorbic acid (Vitamin C) contains a five-membered lactone ring with enediol functionality, classified as an aromatic-type heterocyclic lactone under HTS 2932.20.4500. Imported as bulk pharmaceutical and nutritional supplement intermediate.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Chemical structure certification must emphasize lactone ring to justify Chapter 29 over vitamin preparations
• FDA registration required for food/pharma use; include DMF if for drug manufacturing
• Avoid retail packaging; bulk only to prevent reclassification under Chapter 30 pharmaceuticals