2922.21.40.00/Schaeffer's Salt (2-Naphthylamine-6-sulfonic Acid)/China

Schaeffer's Salt (2-Naphthylamine-6-sulfonic Acid) from China

Schaeffer's salt is a sodium salt of 2-naphthylamine-6-sulfonic acid, a key aminohydroxynaphthalenesulfonic acid derivative used primarily as an intermediate in azo dye synthesis. It falls under HTS 2922.21.4000 as a product described in additional U.S. note 3 to section VI, which covers specific organic compounds subject to quota restrictions for dye production. The compound features both amino and sulfonic acid oxygen functions on a naphthalene ring.

Duty Rate — China → United States

26.5%

Rate breakdown

9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter

9903.88.157.5%Except as provided in headings 9903.88.39, 9903.88.42, 9903.88.44, 9903.88.47, 9903.88.49, 9903.88.51, 9903.88.53, 9903.88.55, 9903.88.57, 9903.88.65, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(r) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(s)

Calculate with your customs value Verify with the Tariff Assistant

Import Tips

• Verify inclusion in additional U.S. note 3 to section VI and obtain necessary quota certificates from U.S

• Customs prior to import

• Provide detailed chemical analysis and CAS number (118-01-4) documentation to confirm classification as an aminohydroxynaphthalenesulfonic acid salt

• Avoid common pitfalls by ensuring purity levels meet chapter 29 requirements for chemically defined organic compounds, preventing reclassification