C.I. Fast Red Base B from Japan
C.I. Fast Red Base B is a sulfonamide-derived diazo component used in the production of azo dyes for textile coloration. It functions as a fast color base that couples with naphthol salts to produce vibrant, lightfast red shades on cotton fabrics. Classified under HTS 2935.90.20.00 as a fast color base within the sulfonamides category per Chapter 29 notes.
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 certificates to confirm chemical identity as per Chapter 29 note (a); ensure packaging prevents moisture absorption which affects reactivity; declare as dye intermediate not finished coloring matter to avoid Chapter 32 reclassification