4-Phenylbutyric Acid Anhydride from Mexico
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 — Mexico → United States
15.5%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Confirm monomeric anhydride vs polymeric per exclusion notes; hazardous material declarations required; purity testing prevents polymer misclassification