α-HBCD Isomer (Alpha-Hexabromocyclododecane) from Canada
The alpha stereoisomer of 1,3,5,7,9,11-hexabromocyclododecane is a specific chemically defined organic compound under HTS 2903.89.40.00. As a halogenated derivative of cyclododecane, it qualifies per chapter notes for separate isomers of organic compounds. Used primarily as a research chemical and flame retardant intermediate.
Duty Rate — Canada → United States
13.7%
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
• Provide HPLC chromatograms showing ≥90% alpha-isomer purity to distinguish from technical mixtures
• Include safety data sheets noting low bioaccumulation factor specific to alpha-HBCD for regulatory review
• Ensure labeling specifies stereochemistry as chapter notes cover isomer mixtures but purity affects end-use declarations