Cinchonidine Sulfate from China
Cinchonidine sulfate is the sulfate salt of cinchonidine, a minor alkaloid from cinchona bark used in organic synthesis and as a chiral resolving agent. It qualifies under HTS 2939.20.0050 as 'other' cinchona alkaloid derivatives. Supplied as high-purity chemical intermediate.
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
• Include NMR/HPLC chromatograms verifying absence of quinine/quinidine impurities
• Label with CAS number (553-73-1 for base) and salt stoichiometry for customs verification
• Check REACH/ TSCA pre-registration for synthesis intermediates