Mixed Aldrin-Heptachlor Standard from Canada
Analytical standard mixture of aldrin and heptachlor isomers, under HTS 2903.82.00.00 per chapter note (b) for mixtures of isomers. Both are named ISO compounds with halogenated cyclanic structures. Used for multi-residue pesticide testing.
Duty Rate — Canada → United States
15.5%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Specify isomer content in entry docs; limit to research quantities under DE minimis
• Pitfall: incorrect isomer declaration leading to higher scrutiny