Riboflavin Acetate Derivative from Mexico
Acetylated Riboflavin for research and specialized nutrition, classified HTS 2936.23.00.00 as Vitamin B2 derivative. Ester follows parent vitamin per Chapter 29 note 3(A/B).
Duty Rate — Mexico → United States
100%
Rate breakdown
9903.04.60100%Pharmaceuticals Annex IV: patented pharma articles — 100% floor rate
9903.05.860%Universal product exemption (U.S. note 52(b))
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• CAS registry and synthesis pathway docs; research exemption declarations; purity certificate essential