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 2915.90.50.50 as 'other' saturated acyclic monocarboxylic acids that are not specifically named elsewhere in heading 2915. This classification applies to its chemical structure as a branched chain C4 acid.
Duty Rate — Japan → United States
23.7%
Rate breakdown
9903.04.6211.2%Patented pharmaceutical articles that are the product of Japan, of a European Union member country, of South Korea, of Switzerland, or of Liechtenstein as provided for in subdivisions (c) and (f) of U.S. note 40 to this subchapter
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
• Provide detailed chemical analysis (GC-MS, NMR) confirming purity and structure to verify classification under 2915
• Include Safety Data Sheets (SDS) and ensure proper UN packaging for corrosive acids during transport
• Avoid misclassification as aromatic acids (2904) by documenting saturated aliphatic nature