Acefylline Piperazine Salt from Canada
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 — Canada → 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
• Document piperazine:acefylline molar ratio; stability testing for salt form; FDA NDC exclusion for bulk