Heptachlor Pure Isomer from Canada
Heptachlor features seven chlorine atoms on cyclodiene ring system, pure isomer for chemical synthesis. Classified HTS 2903.89.31.00 as chlorinated cyclanic derivative without other halogens. Precursor to heptachlor epoxide.
Duty Rate — Canada → United States
15.5%
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
• Verify single isomer purity via HPLC to distinguish from technical mixtures
• Include transformation data to epoxide metabolite for safety documentation
• Limit import quantities due to Restricted Use Pesticide status