Phthalic Hydrazide from Mexico
Phthalic hydrazide, also known as luminol precursor, is a cyclic hydrazide derivative of phthalic acid used in chemiluminescence reagents. Under HTS 2942.00.35.00 as other aromatic organic compounds, its fused ring system with nitrogen functions places it in this residual provision. Excluded from earlier hydrazine headings due to aromatic modification.
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
• Provide reaction synthesis pathway documentation showing derivation from aromatic acids
• Confirm not put up as analytical reagent kit (Chapter 38.22) vs pure compound