2921.45.20.00/8-Amino-2-naphthalenesulfonic acid (Chicago Acid)/Japan

8-Amino-2-naphthalenesulfonic acid (Chicago Acid) from Japan

Chicago acid, or 8-amino-2-naphthalenesulfonic acid, is a key naphthalene-based amine-sulfonic acid used in azo dye manufacturing. Classified under HTS 2921.45.20.00 as a derivative salt of 2-naphthylamine with sulfonic functionality, fitting the aromatic monoamine category in Chapter 29. It appears as an off-white crystalline powder essential for textile dye intermediates.

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

Calculate with your customs value Verify with the Tariff Assistant

Import Tips

• Label shipments with exact CAS number (118-93-4) and batch purity to facilitate CBP verification against the specific HTS listing

• Include end-use statements confirming industrial dye intermediate use to avoid exclusion under note 7(g) for colored preparations

• Check for stabilizer additions; if exceeding safety/transport limits, may require reclassification under different provisions