3-Methyl-5-Pyrazolone Dye Coupler Grade from Canada
Specialty grade 3-Methyl-5-pyrazolone optimized as dye coupler in azo pigment production falls under HTS 2933.19.70.00. Its pure pyrazole structure distinguishes it from formulated dye products excluded by Chapter 29 notes.
Duty Rate — Canada → United States
10%
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 end-use statement specifying dye intermediate to prevent Chapter 32 misclassification
• Comply with Color Additive regulations if traces used in final products
• Test for heavy metal impurities common in pyrazolone synthesis