C.I. Fast Blue Base RR from United States
C.I. Fast Blue Base RR is a sulfonamide fast color base used to produce brilliant blue shades in azo dyeing processes for cellulosic fibers. It diazotizes readily and couples efficiently with beta-naphthol for wash-fast colors. As a chemically defined sulfonamide, it falls under sulphonamides of heading 29.35.
Duty Rate — United States → Canada
0%
Import Tips
• Ensure the product is not formulated with coupling agents, which would shift classification
• Verify the chemical purity for classification
• Check if the product is subject to Canadian chemical regulations