2921.59.17.00/4,4'-Benzidine-2,2'-Disulfonic Acid/Japan

4,4'-Benzidine-2,2'-Disulfonic Acid from Japan

4,4'-Benzidine-2,2'-disulfonic acid is a specific aromatic polyamine derivative with two sulfonic acid groups, explicitly listed under HTS 2921.59.1700. It is a chemically defined organic compound used primarily as an intermediate in dye and pigment synthesis.

Duty Rate — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%

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Import Tips

• Verify chemical purity and provide Certificate of Analysis (CoA) to confirm it matches the exact compound listed in the HTS description

• Ensure packaging complies with DOT/UN hazardous material regulations as it may be classified as corrosive due to sulfonic acid groups

• Avoid misclassification as a dye intermediate under Chapter 32; include lab test results showing it's a separate chemical compound