2921.45.25.00/8-Amino-2-naphthalenesulfonic Acid (1,8 Cleve's Acid)/China

8-Amino-2-naphthalenesulfonic Acid (1,8 Cleve's Acid) from China

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 — China → United States

35%

Rate breakdown

9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter

9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)

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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