4,7-Dichloroquinoline Stabilized with Antioxidant from Mexico
Stabilized 4,7-dichloroquinoline with added antioxidant for transport preservation, permitted under Chapter 29 note (f), maintains classification in HTS 2933.49.08.00 as the primary compound remains chemically defined. Used in multi-step synthesis of quinoline-based APIs.
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
• Document stabilizer addition as 'necessary for preservation' per Chapter Note (f) to justify classification
• Ensure stabilizer <1% w/w to avoid 'particularly suitable for specific use' exclusion
• Separate stabilizer composition in SDS to preempt mixture classification challenges