4,4'-Diamino-2,2'-stilbenedisulfonic acid from Japan
This is a specific aromatic polyamine derivative with two amino groups and sulfonic acid groups, classified under HTS 2921.59.2000 as it exactly matches the chemical structure of 4,4'-diamino-2,2'-stilbenedisulfonic acid. It serves as a key intermediate in dye synthesis, particularly for direct dyes used in textile coloring.
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%
Import Tips
• Verify purity and chemical identity via certificate of analysis to confirm classification under 2921.59.2000
• Include Safety Data Sheet (SDS) and ensure proper hazardous material labeling for sulfonic acid compounds
• Avoid misclassification as finished dyes; this is a pure chemical intermediate per Chapter 29 notes