Azelaic Acid Dimethyl Ester from Japan
Dimethyl azelate, the dimethyl ester of azelaic acid, serves as a chemical intermediate for polymer synthesis and corrosion inhibitors. It qualifies for HTS 2917.13.00.90 as an 'other' ester of acyclic polycarboxylic acids (azelaic/sebacic), being a separate chemically defined compound per Chapter 29 note (a).
Duty Rate — Japan → United States
22.7%
Rate breakdown
9903.04.6210.2%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
• Submit NMR spectrum verifying azelate ester structure; impurities >2% may trigger 'mixture' reclassification
• Declare CAS number 627-93-0 explicitly on commercial invoice for CBP verification
• For drum quantities, ensure UN-approved packaging with proper sebacic/azelaic ester hazard labeling