Schaeffer's Salt (2-Naphthylamine-6-sulfonic Acid) from Mexico
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 — Mexico → United States
Rate breakdown
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