Phthalolactone Blue Intermediate from Canada
Phthalolactone derivatives used as intermediates for blue dyes feature aromatic fused lactone structures, falling under HTS 2932.20.4500. Essential for pigment manufacturing.
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 dye intermediate synthesis pathway documentation linking lactone structure to end-use
• Certify purity >98% to qualify as separate chemically defined compound per Chapter note (a)
• Avoid colorant additions that trigger Chapter exclusion note (g) for coloring matter