Homovanillic Acid from Japan
Homovanillic acid (4-hydroxy-3-methoxyphenylacetic acid) is an aromatic carboxylic acid with phenolic alcohol function, no additional oxygen beyond heading scope. HTS 2918.19.31.00 applies to this 'other' aromatic compound, common in biochemical research and neurotransmitter metabolite analysis.
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
• Document use as lab reagent to avoid pharma exclusions; confirm <1% impurities per note 1(a)
• Bulk imports need stabilizer declarations