Sodium Salt of 2-Naphthylamine-6-sulfonic Acid from China
The sodium salt form of Schaeffer's acid maintains the amine-function classification of the parent acid per Chapter 29 salt note (C)(1). Explicitly covered under HTS 2921.45.25.00 for named naphthylamine sulfonic acid salts. Commonly used in aqueous dye coupling processes.
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)
Import Tips
• Specify counterion (Na+) and assay % on CoA; double salts may require separate review
• Package in 25kg PE-lined fiber drums; avoid glass for corrosive solutions
• Test for heavy metals (<10ppm) to meet TSCA import notification standards