2933.32.50.00/Piperidine-4-Carboxylic Acid/Canada

Piperidine-4-Carboxylic Acid from Canada

Piperidine-4-carboxylic acid (isonipecotic acid) contains both piperidine ring and carboxylic acid functionality but classifies under HTS 2933.32.5000 per Chapter 29 notes prioritizing heterocyclic structure. Used in synthesis of protease inhibitors.

Duty Rate — Canada → United States

16.5%

Rate breakdown

9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
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Import Tips

• Include COA specifying free acid form vs salt to prevent classification disputes

• Package under UN 3261 as corrosive solid, pH <2 in aqueous solution

• Pre-register with FDA if destined for pharmaceutical manufacturing

Piperidine-4-Carboxylic Acid from Canada — Import Duty Rate | HTS 2933.32.50.00