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%Section 301 (forced labor) — European Union member state (col1 rate < 10 percent): MFN < 10% → total duty capped at 10%
Import Tips
• pH verification required; free acid form < pH 2 confirms not salt form
• Corrosive handling precautions mandatory per DOT/ADR regulations