Tobias Acid (2-Naphthylamine-8-sulfonic acid) from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
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