Collidine Mixture (2,4,6-Trimethylpyridine) from Mexico
Collidine refers to trimethylpyridines like 2,4,6-trimethylpyridine, used in epoxy resin curing and as resolving agents. HTS 2933.39.10.00 covers collidines as specifically named pyridine derivatives with unfused rings. High boiling point (170°C) solvent applications.
Duty Rate — Mexico → United States
110%
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
9903.05.5510%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
• HPLC chromatogram required to confirm trimethylpyridine composition vs. diethylpyridines
• UN 2610 Corrosive classification if >90% concentration; neutralization agents prohibited
• Avoid bulk imports without stabilizer declaration per Chapter 29 note (f)