Tobias Acid (2-Naphthylamine-8-sulfonic acid) from Mexico
Tobias acid serves as a key dye intermediate with amino, hydroxy, and sulfonic functionalities on naphthalene, used in acid dyes and optical brighteners. It qualifies as a separate chemically defined organic compound under Chapter 29. Falls under 2922.21.5000 for other aminohydroxynaphthalenesulfonic acids.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Include spectroscopic data (NMR/IR) proving amino-hydroxy-sulfonic structure to distinguish from Chapter 29 exclusions
• Watch for salt forms; declare as sodium salt if applicable, avoiding bulk chemical misclassification