3-Methyl-1-p-sulophenyl-5-pyrazolone from Canada
Sulfonated pyrazolone used in color photographic coupler chemistry and dye synthesis. The aromatic-modified pyrazole ring structure fits HTS 2933.19.30.95 specifications for photographic chemicals.
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
• Include sulfonation degree certificates as modified aromatic status affects subheading
• Provide batch purity analysis to distinguish from dye intermediates under Chapter 32
• Ensure wastewater treatment documentation for handling sulfonated compounds