8-Amino-2-naphthalenesulfonic Acid (1,8 Cleve's Acid) from Japan
8-Amino-2-naphthalenesulfonic acid (Cleve's acid 1,8-isomer) is a naphthylamine derivative used in direct dye synthesis. Named in HTS 2921.45.25.00 for mixtures containing this compound, it is a chemically defined aromatic amine per Chapter 29 scope. The sulfonic group maintains its amine-function classification.
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
• Provide batch-specific purity certificates (>98%) to qualify as 'chemically defined' vs mixtures
• Declare exact CAS number (118-43-4) on commercial invoice for automated CBP processing
• Monitor for cumulative impurities; levels >2% may shift to 2921.45.50 other derivatives