Fast Black Base N from China
Fast Black Base N, derived from aromatic monoamines, serves as a diazo component for deep black shades in naphthol dyeing with excellent all-around fastness properties. Primarily used for denim and khaki fabrics. Classifies under HTS 2921.42.55.00 as an aniline derivative fast color base per Chapter 29 amine-function provisions.
Duty Rate — China → United States
19%
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
Import Tips
• Provide evidence of commercial identity as 'fast color base' through supplier catalogs and technical literature
• Salt forms classify with parent amine per Note 5(C)(1); confirm no coordination compounds triggering later headings
• Segregate from finished dye pastes to avoid Chapter 32 classification during customs examination