Potassium 1-Naphthol-4-sulfonate
Potassium salt form of 1-Naphthol-4-sulfonic acid, soluble for use in textile dye manufacturing. Fits HTS 2908.99.06.00 as a salt of a sulfo-group derivative of phenol-alcohols, following Chapter 29 salt classification rules.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for industrial dye synthesis but in formulated mixtures
Mixtures of synthetic organic coloring intermediates fall under Chapter 32 if not pure.
If classified as a non-sulfonated phenol derivative
Sulfonation defines the 2908 heading; without it, phenolic alcohols go to 2907.
If heavily diluted as fertilizer additive
End-use as mineral mixture shifts to Chapter 31, not chemical classification.
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
• Submit spectroscopic data confirming structure and salt form
• Check for anti-dusting agents that might trigger note (g) reclassification
• Use industrial packaging to avoid retail interpretations
Related Products under HTS 2908.99.06.00
1-Naphthol-4-sulfonic acid
1-Naphthol-4-sulfonic acid is a sulfonated derivative of 1-naphthol, featuring a sulfo group at the 4-position on the naphthalene ring. It falls under HTS 2908.99.06.00 as a chemically defined organic compound containing only sulfo groups, classified among halogenated, sulfonated derivatives of phenols or phenol-alcohols.
Sodium 1-Naphthol-4-sulfonate
The sodium salt of 4-Hydroxy-1-naphthalenesulfonic acid, used in azo dye coupling reactions. Classified under HTS 2908.99.06.00 per Chapter 29 note 5(C)(1), as inorganic salts of organic sulfo-function compounds are placed with the parent acid.
4-Hydroxy-1-naphthalenesulfonic acid, 98% purity
High-purity technical grade 1-Naphthol-4-sulfonic acid for pharmaceutical and dye intermediates. Qualifies under HTS 2908.99.06.00 as a separate chemically defined compound with only sulfo groups, per Chapter 29 scope.
1-Naphthol-4-sulfonic acid monohydrate
Hydrated form of 1-Naphthol-4-sulfonic acid, stable for transport in dye production. Remains under HTS 2908.99.06.00 as water-associated product of (d) note, not altering chemical classification.
Ammonium 1-Naphthol-4-sulfonate
Ammonium salt of 4-Hydroxy-1-naphthalenesulfonic acid, used in analytical chemistry. Classified in HTS 2908.99.06.00 following Chapter 29 rule for salts of sulfo derivatives.