Riboflavin Butyrate from Mexico
An ester derivative of Riboflavin designed for enhanced bioavailability in vitamin supplements. Falls under HTS 2936.23.00.00 as a Vitamin B2 derivative used primarily as a vitamin, classified with the parent vitamin per Chapter 29 ester rules.
Duty Rate — Mexico → United States
100%
Rate breakdown
9903.04.60100%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Document esterification process and bioavailability studies; confirm no solvent impurities violating Chapter 29 note (e); use correct CAS number for customs verification