O,O-Dimethyl S-phenyl phosphorothioate from Canada
Simple aromatic phosphorodithioate ester serving as intermediate for insecticide synthesis and analytical standards. Falls under HTS 2920.19.40.00 as 'other' aromatic thiophosphoric ester without additional heteroatoms. The phenyl-thiophosphoryl structure defines its chapter 29 classification.
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Submit NMR spectra confirming thiophosphoric ester structure; declare as research chemical if <1kg to simplify EPA requirements; ensure packaging prevents solvent absorption per chapter note (e)