Fast Blue Base RS from Japan
Fast Blue Base RS is a high-purity aromatic amine diazo component producing navy blue dyes with superior light fastness ratings. Falls under HTS 2921.49.32.00 as fast color base per Chapter 29 exclusion from coloring matter headings. Critical for automotive textile applications.
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
• Include HPLC purity assay (>99%) confirming chemically defined compound status
• Comply with California Proposition 65 labeling if trace carcinogens detected
• Document exclusion from Chapter 32 by demonstrating requirement for diazotization step