8-Amino-1-naphthalenesulfonic Acid (Free Acid Form) from Germany
Free acid form of Schaeffer's acid used where strong acidic conditions needed in dye processes. Specifically listed under HTS 2921.45.10.00 covering both acids and salts. Pure chemically defined aromatic sulfonic acid amine.
Duty Rate — Germany → United States
10%
Rate breakdown
9903.05.3910%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.97, articles the product of a member state of the European Union, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 10 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• pH verification required; free acid form < pH 2 confirms not salt form
• Corrosive handling precautions mandatory per DOT/ADR regulations