Acefylline Piperazine Salt from Mexico
Acefylline piperazine is a theophylline-7-acetic acid piperazine salt, used as a vasodilator. Falls under HTS 2939.59.00.00 per note 5(C)(1) classifying organic salts with parent alkaloid. Stable crystalline form for tablets.
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
• Document piperazine:acefylline molar ratio; stability testing for salt form; FDA NDC exclusion for bulk