1,2,5,8-Tetrahydroxyanthraquinone (Quinizarin) from Canada
Quinizarin contains four hydroxy groups on the anthraquinone core, classified as quinone with other oxygen functions under HTS 2914.61.00.00. Important for disperse dye manufacturing.
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
• Melting point (194-197°C) specification confirms identity from commercial sources
• Sublimation purification common; declare post-purification purity level
• Technical vs. analytical grades affect documentation requirements