1-Naphthylamine-4,8-disulfonic Acid
This disulfonic acid derivative of 1-naphthylamine features two sulfonic acid groups, qualifying under HTS 2921.45.60.00 per additional U.S. note 3 to section VI. Used primarily as a dye intermediate in textile and leather industries.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If specifically listed naphthylamine salt
Certain enumerated salts of naphthylamines have separate statistical suffixes.
If considered sulfonated hydrocarbon derivative
Sulfonated naphthalene without prominent amine function may classify under Chapter 29 hydrocarbons.
If imported as dye mixture solution
Mixtures containing >30% by weight of this compound in solvent classify as chemical preparations.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Include detailed chemical structure and CAS number on commercial invoice for CBP verification
• Package in UN-approved containers suitable for corrosive liquids/solids
• Maintain records proving industrial intermediate use to avoid end-use reclassification
Related Products under HTS 2921.45.60.00
4-Amino-1-naphthalenesulfonic Acid
4-Amino-1-naphthalenesulfonic acid is an aromatic monoamine derivative of 1-naphthylamine with a sulfonic acid group, classified under HTS 2921.45.60.00 as a derivative of naphthylamine described in additional U.S. note 3 to section VI. It is commonly used as an intermediate in the production of azo dyes and pigments.
2-Naphthylamine-6-sulfonic Acid (Schaeffer's Acid)
Schaeffer's acid is a key 2-naphthylamine derivative with a sulfonic acid substituent at position 6, falling under HTS 2921.45.60.00 due to additional U.S. note 3. Essential for manufacturing acid dyes and direct dyes.
1-Naphthylamine-8-sulfonic Acid (Peri Acid)
Peri acid, or 1-naphthylamine-8-sulfonic acid, is a derivative covered by HTS 2921.45.60.00 under additional U.S. note 3 to section VI. Widely used in azo pigment synthesis for inks and coatings.
2-Naphthylamine-3,6-disulfonic Acid (R Acid)
R Acid is a disulfonated derivative of 2-naphthylamine included in HTS 2921.45.60.00 per U.S. note 3. Critical intermediate for direct and reactive dyes used in cotton dyeing.
1-Naphthylamine-5-sulfonic Acid (Laurent's Acid)
Laurent's acid, a monosulfonated 1-naphthylamine derivative, is classified under HTS 2921.45.60.00 as specified in additional U.S. note 3. Used in manufacturing of acid dyes for wool and silk.