High Purity 4,7-Dichloroquinoline 99.5%+ for API Synthesis from Mexico

Ultra-high purity 4,7-dichloroquinoline (>99.5%) is a separate chemically defined compound with a quinoline ring system, used for active pharmaceutical ingredient synthesis. It qualifies under Chapter 29 Note 1(a) as a product of heading 29.33. The high purity does not affect classification.