Cinchonidine from China
Cinchonidine free base is the native alkaloid from cinchona bark, used as chiral catalyst precursor. HTS 2939.20.0050 covers this as other non-salt cinchona alkaloid. Oil-soluble form for asymmetric synthesis.
Duty Rate — China → United States
100%
Rate breakdown
9903.04.60100%Pharmaceuticals Annex IV: patented pharma articles — 100% floor rate
9903.05.860%Universal product exemption (U.S. note 52(b))
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
• Provide specific rotation [-100° to -115°] confirming natural origin
• GC-MS confirmation of quinuclidine ring system
• Stability data under inert atmosphere storage