Fast Violet Base 3B from China
Fast Violet Base 3B is a chemically pure aromatic cyclic carbamate used as a diazo base for violet-fast azo colorants in leather dyeing. HTS 2924.29.52.00 covers it as a fast color base amide-function compound.
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
• Include chromatograms proving single isomer per note (b); GOTS certification if organic textile chain
• Common issue: salt forms misclassified under note (C)