Norbornane tetracarboxylic dianhydride from China
Norbornane tetracarboxylic dianhydride is a bicyclic cyclanic compound with four carboxylic groups forming dual anhydride functionalities on a norbornane framework. As a separate chemically defined organic compound, it qualifies as a cyclanic polycarboxylic acid derivative under tariff item 2917.20.00. It is used in the production of polyimide films and high-performance polymers.
Duty Rate — China → Canada
0%
Import Tips
• Ensure the dianhydride is not a polymer precursor that might be classified as a polymer in primary forms
• If it contains impurities, they must be incidental to its production
• Provide the CBSA with the chemical structure and purity certificate to support the classification