O-Ethyl Methyl Phosphonofluoridate (EMPF) from Canada
A halogenated organo-phosphorus compound with an ethyl group and methyl substituent on the phosphorus atom bonded to fluoride. It falls under HTS 2931.59.0010 as an O-alkyl (C2) alkyl (methyl) phosphonofluoridate, matching the chemical structure defined in the heading for other halogenated organo-phosphorous derivatives. These are separate chemically defined organic compounds per Chapter 29 note (a).
Duty Rate — Canada → United States
13.7%
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
• Require end-user certificates and verify compliance with Chemical Weapons Convention (CWC) schedules; ensure SDS documentation specifies exact chemical purity
• Common pitfall: misclassification as pesticide intermediate without fluoride confirmation
• Consult CBP for Schedule 1 chemical import permits