Isobutyric Acid from Japan
Isobutyric acid (2-methylpropanoic acid) is a saturated acyclic monocarboxylic acid used in organic synthesis, flavor production, and as an intermediate for pharmaceuticals. It falls under HTS 2915.90.50 as a chemically defined saturated acyclic monocarboxylic acid not specifically named elsewhere in heading 2915.
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
• Verify purity certificate (≥98%) to confirm classification as chemically defined compound per Chapter 29 note (a)
• Include Material Safety Data Sheet (MSDS) showing it's not halogenated/sulfonated to avoid reclassification
• Declare exact CAS number (79-31-2) on entry documents to prevent customs disputes