Laurent's Acid (5-Amino-1-naphthalenesulfonic acid) from Japan
Laurent's acid is a sulfonated derivative of 1-naphthylamine, specifically 5-amino-1-naphthalenesulfonic acid, used primarily as an intermediate in dye synthesis. It falls under HTS 2921.45.20.00 as an aromatic monoamine derivative with sulfonic acid groups, matching the chapter's provisions for chemically defined organic compounds with nitrogen functions. The product is typically supplied as a white to light yellow powder for industrial chemical applications.
Duty Rate — Japan → United States
Rate breakdown
Import Tips
• Provide detailed chemical analysis certificates confirming purity and identity as Laurent's acid to avoid misclassification under general aromatic amines
• Ensure SDS (Safety Data Sheets) comply with HAZMAT regulations since sulfonic acids are corrosive; declare proper UN numbers for transport
• Verify supplier COA matches the exact HTS description to prevent reclassification into higher-duty sulfonated compounds