Fast Black Base N from Canada
Fast Black Base N, a sulfonated amino-phenol ether, functions as a diazotizable base for deep black azo dyes in wool dyeing with high light stability. It is classified in HTS 2922.29.2600 as a fast color base, including sulfonated derivatives per Chapter 29 additional notes.
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Document sulfonation degree; compound derivatives still classify here unless only S-halogen atoms per 2930/2931 notes
• Require end-user certificates if dual-use concerns arise for dye vs. other chemical applications
• Monitor for emetic additions; safety additives must not change general use per Chapter 29 note (g)