Schaeffer's Acid (2-Naphthylamine-6-sulfonic acid) from Germany
Schaeffer's acid is an aminohydroxynaphthalenesulfonic acid used primarily as an intermediate in the production of azo dyes and pharmaceuticals. It features an amino group, hydroxyl group, and sulfonic acid group attached to a naphthalene ring, fitting Chapter 29 note (a) for chemically defined organic compounds. Classified under 2922.21.5000 as 'other' aminohydroxynaphthalenesulfonic acids and their salts.
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
• Provide detailed chemical analysis certificates confirming structure as aminohydroxynaphthalenesulfonic acid to avoid reclassification
• Ensure SDS and purity documentation; common pitfall is mislabeling as simple naphthols (2907) without amino function
• Declare CAS number (92-32-0) on entry for customs verification