N-Phenylsemicarbazide from Mexico
N-Phenylsemicarbazide is used for carbonyl derivatization in chromatography. As a ureine derivative, it falls under HTS 2924.21.50.00 'other' category.
Duty Rate — Mexico → United States
110%
Rate breakdown
9903.04.6093.5%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
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• TLC purity >98% for derivatization reagent specification
• Solvent-free packaging prevents Chapter 29 note (e) exclusion
• Avoid pharma intermediate declaration triggering FDA