1-Naphthylamine-5-sulfonic Acid (Laurent's Acid)
Laurent's acid, or 1-naphthylamine-5-sulfonic acid, is a monosulfonated derivative of 1-naphthylamine, used in the manufacturing of acid dyes for wool and silk. It is a chemically defined aromatic monoamine, classified under the tariff item for naphthylamine derivatives. The amine function is the principal characteristic, aligning with heading 29.21.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
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Import Tips & Compliance
• Confirm the product is a separate chemically defined compound under Chapter 29 Note 1(a)
• If the product is a salt, classify it with the parent compound per Note 5(C)(1)
• Provide a certificate of analysis to the CBSA to support the classification
Related Products under Tariff item 2921.45.00
1-Naphthylamine-4,8-disulfonic Acid
1-Naphthylamine-4,8-disulfonic acid is a disulfonic acid derivative of 1-naphthylamine, used as a dye intermediate in textile and leather applications. It retains the primary amine function and is classified under the tariff item for naphthylamine derivatives. The presence of two sulfonic acid groups does not change its classification as an aromatic monoamine derivative.
1-Naphthylamine-4,8-disulfonic Acid (C Acid)
C Acid, or 1-naphthylamine-4,8-disulfonic acid, is a disulfonated derivative of 1-naphthylamine used in azo dye synthesis for textiles and leather. It is a chemically defined aromatic monoamine, classified under the tariff item for naphthylamine derivatives. The amine function is the principal characteristic, aligning with heading 29.21.
1-Naphthylamine-4,8-disulfonic Acid (Casella's Acid)
1-Naphthylamine-4,8-disulfonic acid, also known as Casella's acid, is a naphthylamine derivative with two sulfonic acid groups, used primarily as an intermediate in the synthesis of direct dyes. It retains the primary amine function characteristic of heading 29.21, and its sulfonic acid substituents do not alter its classification as an aromatic monoamine derivative. This tariff item covers 1-naphthylamine, 2-naphthylamine, and their derivatives, including salts thereof.
1-Naphthylamine-8-sulfonic Acid (Peri Acid)
Peri acid, or 1-naphthylamine-8-sulfonic acid, is a derivative of 1-naphthylamine used in azo pigment synthesis for inks and coatings. It is a chemically defined aromatic monoamine with a sulfonic acid group, classified under the tariff item for naphthylamine derivatives. The primary amine function determines its classification in heading 29.21.
1-(Phenylamino)naphthalin-8-sulfonic Acid
1-(Phenylamino)naphthalin-8-sulfonic acid is an N-phenyl substituted derivative of peri acid, used in acid dye manufacture. It retains the naphthylamine structure and is classified under the tariff item for naphthylamine derivatives. The N-phenyl substitution does not remove it from the scope of aromatic monoamine derivatives.
2-Naphthylamine-1-sulfonic Acid (Tobias Acid)
2-Naphthylamine-1-sulfonic Acid, also known as Tobias Acid, is a sulfonated derivative of 2-naphthylamine used primarily in the synthesis of reactive dyes for cotton textiles. As an aromatic monoamine derivative with a sulfonic acid group, it falls under tariff item 2921.45.00, which covers naphthylamine derivatives and their salts. The amine function is the principal characteristic, consistent with Chapter 29 classification rules.