Cinchonidine Sulfate from Mexico
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 — Mexico → United States
100%
Rate breakdown
9903.04.60100%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
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
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