Ascorbic Acid (Vitamin C) from Japan
Ascorbic acid is a water-soluble vitamin classified as an aromatic lactone under HTS 2932.20.3000 due to its heterocyclic structure with oxygen hetero-atom in a lactone ring. It meets the criteria in additional U.S. note 3 to section VI for specific organic compounds.
Duty Rate — Japan → United States
21%
Rate breakdown
9903.04.628.5%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
• Verify purity certificate (typically 99%+ for pharmaceutical grade) to confirm classification under note 3,Include chemical analysis documentation proving lactone structure for customs verification,Avoid misclassification as food additive under Chapter 21; provide structural formula