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
16.5%
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
Import Tips
• pH verification required; free acid form < pH 2 confirms not salt form
• Corrosive handling precautions mandatory per DOT/ADR regulations