Piperidine-4-Carboxylic Acid from United States
Piperidine-4-carboxylic acid, also known as isonipecotic acid, is a piperidine derivative with a carboxylic acid functional group at the 4-position. Despite the additional acid functionality, Chapter 29 notes direct classification with the heterocyclic compound, piperidine, as the ring structure determines the heading. It is used as an intermediate in pharmaceutical synthesis.
Duty Rate — United States → Canada
0%
Import Tips
• Classify piperidine-4-carboxylic acid under 2933.32.00 as a piperidine salt or derivative; the carboxylic acid group does not change the classification
• Provide the chemical name and CAS number on shipping documents to avoid delays
• Check if the product is subject to the Canadian Environmental Protection Act, 1999 (CEPA) for import notification