2921.45.10.00/7-Amino-1,3-naphthalenedisulfonic acid (Sodium Salt)/China

7-Amino-1,3-naphthalenedisulfonic acid (Sodium Salt) from China

This is the sodium salt of 7-Amino-1,3-naphthalenedisulfonic acid, a chemically defined aromatic amine derivative with sulfonic acid groups, used primarily as an intermediate in azo dye synthesis. It falls under HTS 2921.45.10.00 as it is specifically listed among the naphthalenedisulfonic acid amine derivatives and their salts in the amine-function compounds heading. The compound contains the characteristic amino group on a naphthalene ring with sulfonic substituents.

Duty Rate — China → United States

44%

Rate breakdown

9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter

9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)

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Import Tips

• Verify purity certificate (≥98%) and provide chemical analysis to confirm it matches the specific isomer listed in HTS 2921.45.10.00

• Include Safety Data Sheet (SDS) and ensure packaging prevents moisture absorption, as required for chemical transport

• Avoid misclassification as general sulfonated naphthalene derivatives; specify exact CAS number (e.g

• 134-47-4 for isomeric form)