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2921.45.90/1-Naphthylamine-4,8-disulfonic Acid (C Acid)/Mexico

1-Naphthylamine-4,8-disulfonic Acid (C Acid) from Mexico

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.

Duty Rate — Mexico → United States

16.5%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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Import Tips

• Include IUPAC name and CAS (94-70-2) on documentation; declare as dye intermediate to avoid Chapter 32 misclassification

• Ensure packaging meets UN standards for corrosive solids; common issue is inadequate hazard labeling

• Provide end-use certificate if importing for dye manufacturing to facilitate CBP review

1-Naphthylamine-4,8-disulfonic Acid (C Acid) from Mexico — Import Duty Rate | HTS 2921.45.90