Cinchonine Base from China
Cinchonine free base alkaloid from cinchona used in stereoselective synthesis and alkaloid research. Classified HTS 2939.20.0050 as other cinchona alkaloid. Research chemical grade.
Duty Rate — China → 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
• Melting point 263-264°C confirmation
• NMR verification of methoxyquinoline moiety
• Declare research vs commercial intent