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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If guanidine-like ammonium structure emphasized
Amine-function compounds in 2921, but sulfo acid base takes precedence numerically.
If direct use in reactive dye formulation
Reactive dyes incorporating such salts classify in Chapter 32.
If industrial bulk without organic purity
Other salts in Chapter 28 if not meeting organic compound criteria.
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Import Tips & Compliance
• Declare cation ratio to avoid misclassification as organic base salt
• Use lab-grade labeling for compliance
• Monitor for emetic additions triggering safety note (g)
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.
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.
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.