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%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
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