C.I. Fast Red Base B from China
C.I. Fast Red Base B is a sulfonamide-derived diazo component used in the production of azo dyes for textile coloration. It functions as a fast colour base that couples with naphthol salts to produce vibrant, lightfast red shades. As a separate chemically defined organic compound with a sulfonamide group, it is classified under tariff item 2935.90.00.
Duty Rate — China → Canada
Import Tips
• Confirm the product is not put up in measured doses or for retail sale, as that would shift classification to Section VI headings like 32.12
• Provide a detailed technical data sheet to CBSA showing the chemical structure and sulfonamide functional group
• Check if the product is subject to any import restrictions under the Canadian Environmental Protection Act, as some dye intermediates may be regulated