4-Phenylbutyric Acid Anhydride from Canada
Symmetric anhydride of 4-phenylbutyric acid, classified with parent aromatic monocarboxylic acid under HTS 2915.60.10.00. Acylation agent in organic synthesis.
Duty Rate — Canada → United States
15.5%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Confirm monomeric anhydride vs polymeric per exclusion notes; hazardous material declarations required; purity testing prevents polymer misclassification