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
100%
Rate breakdown
9903.04.6093.5%Pharmaceuticals Annex IV: patented pharma articles — 100% floor rate
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
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