</>Build with Tariff Intelligence|Programmatic access to tariff calculations and HS code classification.Explore Developer Resources →
2921.45.20.00/3-Amino-2,7-naphthalenedisulfonic acid (H-acid)/Mexico

3-Amino-2,7-naphthalenedisulfonic acid (H-acid) from Mexico

H-acid, or 3-amino-2,7-naphthalenedisulfonic acid, is a disulfonated naphthylamine derivative critical for reactive dye synthesis. It is specifically listed under HTS 2921.45.20.00 as an aromatic amine derivative with multiple sulfonic groups. The compound is a brownish powder used in high-performance textile dyes.

Duty Rate — Mexico → United States

15.8%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Calculate with your customs valueVerify classification with AI

Import Tips

• Submit chromatograms proving disulfonic structure to distinguish from mono-sulfonic analogs in the same HTS

• Package in moisture-proof containers; hygroscopic nature requires specific declaration for stability claims

• Avoid anti-dusting agents that impart color, as per note 1(g), to maintain pure chemical classification

3-Amino-2,7-naphthalenedisulfonic acid (H-acid) from Mexico — Import Duty Rate | HTS 2921.45.20.00