6-Amino-1-Naphthol-3-Sulfonic Acid (J Acid)
J Acid contains amino group on naphthalene making it a naphthylamine derivative despite hydroxy substituent. Classifies HTS 2921.45.90 as 'other' aromatic monoamine derivative. Oxygen function secondary to nitrogen-function per Chapter 29 rules.
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More Specific Codes
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If hydroxy function considered principal
Amino-hydroxy-naphthalenes might classify under amino-alcohols if OH dominates.
If deaminated naphthol derivative
Without amino group, classifies as halogenated/nitrated/sulfonated naphthol.
If acid dyes containing J acid moiety
Finished acid dyes exclude from Chapter 29 per note 2(g).
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Import Tips & Compliance
• Highly reactive; must ship with stabilizer per chapter note (f)
• Distinguish from Gamma acid (8-isomer); CAS 89-63-4 specific
• Oxidation sensitivity requires nitrogen blanketing in packaging
Related Products under HTS 2921.45.90
4-Amino-1-naphthalenesulfonic Acid
4-Amino-1-naphthalenesulfonic acid is a derivative of 1-naphthylamine with a sulfonic acid group attached, classified under HTS 2921.45.90 as an 'other' aromatic monoamine derivative and salt thereof. It is primarily used as an intermediate in the production of azo dyes and pigments.
1-Naphthylamine-4,8-disulfonic Acid (C Acid)
C Acid is a disulfonated derivative of 1-naphthylamine used extensively in azo dye synthesis for textiles and leather. It falls under HTS 2921.45.90 as an 'other' derivative of 1-Naphthylamine per Chapter 29 amine-function compounds. The naphthalene ring with amino group maintains its primary classification.
2-Naphthylamine-6-sulfonic Acid (Laurent's Acid)
Laurent's Acid is a sulfonated derivative of 2-naphthylamine (β-Naphthylamine) used in manufacturing acid dyes and pharmaceuticals. Classified under HTS 2921.45.90 as 'other' aromatic monoamine derivatives; salts thereof in Chapter 29. The retained naphthylamine structure governs classification over sulfonation.
1-Naphthylamine-8-sulfonic Acid (Peri Acid)
Peri Acid serves as a dye intermediate for naphthol AS dyes used in textile coloration. It qualifies under HTS 2921.45.90 as an 'other' 1-Naphthylamine derivative per Chapter 29's amine-function compounds. The peri-position sulfonic acid maintains aromatic monoamine classification.
N-Phenyl-1-Naphthylamine
N-Phenyl-1-naphthylamine (Neozone D) acts as an antioxidant and stabilizer in rubber and lubricant formulations. It classifies under HTS 2921.45.90 as a derivative of 1-Naphthylamine (aromatic monoamine). The secondary amine structure on naphthalene ring fits Chapter 29 perfectly.
2-Naphthylamine-1-sulfonic Acid (Tobias Acid)
Tobias Acid is the 1,2-isomer used in reactive dye synthesis for cotton textiles. HTS 2921.45.90 covers it as 'other' β-Naphthylamine derivative; salts thereof. Chapter 29 notes confirm amine-function precedence over sulfonation.