1-Naphthol-3,6-Disulfonic Acid (H Acid precursor salt)
A disulfonic acid salt of 1-naphthol, captured in HTS 2907.15.60.00 'other' category for naphthols and salts. Intermediate for H-acid used in reactive dyes.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If amino group present (full H-acid)
Amino-hydroxy-naphthalene sulfonic acids classified in 2922.29 per numerical order rule.
If for industrial use with anticaking agents
Exceeds chapter note (f) stabilizer allowance, becoming prepared chemical under 3824.
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
• Chemical assay reports must show naphthol as principal characteristic group
• Declare CAS 104-64-3 accurately to prevent isomer confusion
• Avoid adding identification agents beyond chapter note (g) limits
Related Products under HTS 2907.15.60.00
1-Naphthol
1-Naphthol is a monophenolic compound derived from naphthalene, classified under HTS 2907.15.60.00 as one of the 'other' naphthols and their salts. It is a chemically defined organic compound used primarily as an intermediate in dye synthesis and pharmaceutical production.
2-Naphthol
2-Naphthol, also known as β-naphthol, is a key monophenol in the naphthols category under HTS 2907.15.60.00. This separate chemically defined compound serves as a critical intermediate for azo dyes, antioxidants, and rubber chemicals.
Martius Yellow Base (1-(2,4-Dinitrophenylazo)-2-Naphthol)
While technically an azo compound, pure Martius Yellow base retains naphthol classification under HTS 2907.15.60.00 when imported as chemical intermediate. Used in biological staining and pigment production.
Tobias Acid Sodium Salt (2-Naphthylamine-6-Sulfonic Acid precursor)
Sodium salt of naphthol sulfonic acid used in dye chemistry, classified under HTS 2907.15.60.00 'other naphthols.' Key for naphthol AS dye series.
Sodium 1-Naphthol-4-Sulfonate
This is the sodium salt of 1-naphthol-4-sulfonic acid, classified as 'other' naphthols and their salts in HTS 2907.15.60.00 per chapter note 3(C)(1). It functions as a diazo dye coupling component in textile coloration.
2-Naphthol-6,8-Disulfonic Acid Disodium Salt (Schaeffer Salt)
Schaeffer salt is a disulfonated naphthol sodium salt under HTS 2907.15.60.00 as 'other' naphthols and salts. Used in azo dye production for textiles and leather.