5-Amino-2-(phenylamino)benzenesulfonic Acid Naphthylamide
This complex naphthylamide derivative of naphthylamine serves in high-performance dye synthesis. Classified under HTS 2921.45.90.90 as an unspecified naphthylamine derivative, it qualifies via the core aromatic amine structure. Chapter 29 notes confirm inclusion despite amide and sulfonic modifications.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If amide function (-CONH-) predominates over amine
Carboxamide-function compounds class in 2924 per oxygen-function rules.
If for organo-sulfur compounds with thioamide linkage
Sulfur directly linked to carbon triggers 2930 classification.
If pre-reacted with diazo components
Any azo coupling creates synthetic coloring matter excluded from Chapter 29.
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Import Tips & Compliance
• Complex structure requires binding ruling application for consistent classification
• Verify molecular weight and formula match; amides can blur into Chapter 29 later headings
• Import under temporary codes if new derivative; seek advance CBP classification
Related Products under HTS 2921.45.90.90
4-Amino-1-naphthalenesulfonic Acid
4-Amino-1-naphthalenesulfonic acid is a derivative of 1-naphthylamine with a sulfonic acid group, used primarily as an intermediate in dye manufacturing. It falls under HTS 2921.45.90.90 as a derivative of 1-naphthylamine (α-naphthylamine) that is not specifically listed elsewhere in the subheading. This aromatic monoamine derivative contains the characteristic amine-function group directly linked to the naphthalene ring.
1-Naphthylamine-4,8-disulfonic Acid
This disulfonic acid derivative of 1-naphthylamine serves as a key intermediate for acid dyes and azoic coupling components. Classified under HTS 2921.45.90.90 as an 'other' derivative of α-naphthylamine, it retains the primary aromatic amine function despite sulfonic substitutions. The classification follows Chapter 29 rules prioritizing amine-function compounds.
7-Amino-1-hydroxynaphthalene-3-sulfonic Acid
Also known as J acid, this naphthylamine derivative with hydroxy and sulfonic groups is crucial for synthesizing reactive and direct dyes. It qualifies for HTS 2921.45.90.90 as an 'other' derivative of 1-naphthylamine per Chapter 29 amine-function priority. The molecule's primary aromatic amine defines its tariff classification.
1-Naphthylamine-8-sulfonic Acid (Peri Acid)
Peri acid is a monosulfonic derivative of 1-naphthylamine used in azo dye production for textiles. It falls under HTS 2921.45.90.90 as an unspecified derivative of α-naphthylamine, maintaining classification in the amine-function heading. The sulfonic acid enhances water solubility without altering the core amine classification.
4-Amino-5-hydroxynaphthalene-2,7-disulfonic Acid (H Acid)
H acid is a multi-substituted 1-naphthylamine derivative essential for direct and reactive dyes in cotton dyeing. Classified in HTS 2921.45.90.90 as 'other' α-naphthylamine derivative, the amine group defines its place despite phenolic and sulfonic functions. Chapter 29 classification rules ensure amine-function precedence.
2-Naphthylamine-6-sulfonic Acid (Laurent's Acid)
Laurent's acid, a derivative of 2-naphthylamine (β-naphthylamine), is used in acid dye synthesis. It is classified under HTS 2921.45.90.90 as an 'other' derivative within the naphthylamine subheading. The aromatic amine-function remains the principal characteristic for tariff purposes.