4-Hydroxy-1-naphthalenesulfonic acid sodium salt from Mexico
Sodium salt of 4-hydroxy-1-naphthalenesulfonic acid (also known as Laurent's acid salt), explicitly provided for in HTS 2908.99.0300. This sulfonated naphthol derivative contains only sulfo groups and qualifies as a chemically defined compound of chapter note (a). Essential intermediate for direct and reactive dyes.
Duty Rate — Mexico → United States
15.5%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Reference specific CAS 130-94-9 and provide structure confirmation to match exact listed compound
• Test for heavy metals and purity (>98%) as dye intermediates face strict quality requirements
• Declare if anticaking agents added per chapter note (f) to avoid reclassification as mixtures