4-Phenylbutyric Acid from Japan
4-Phenylbutyric acid (C6H5(CH2)3COOH) is a saturated acyclic monocarboxylic butanoic acid with an aromatic phenyl substituent. Classified under HTS 2915.60.10.00 as an aromatic derivative of butanoic acid per heading 2915 structure. Used in chemical synthesis and as a histone deacetylase inhibitor.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include NMR or GC-MS spectra verifying aromatic butanoic structure; declare exact carbon chain length to distinguish from pentanoic acids; avoid misclassification as Chapter 29 acyclic hydrocarbons