Chloramphenicol Acetyl Derivative from China
N-acetyl protected intermediate derivative of chloramphenicol used in synthesis of modified antibiotics. Falls under HTS 2941.40.00.00 as chemically defined chloramphenicol derivative. Pharmaceutical intermediate for research and production.
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
• Deprotection stability data needed; acetyl groups hydrolyze above 40°C affecting declared purity
• Declare CAS 1442-35-1 or equivalent; generic 'antibiotic' descriptions trigger CBP review
• Lab synthesis grade requires TSCA notification for US manufacturing import