Lawesson's Reagent from Canada
Lawesson's reagent (2,4-bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane 2,4-disulfide) is a thionation agent, classified under HTS 2942.00.50.00. This organophosphorus dithio compound converts carbonyls to thiocarbonyls.
Duty Rate — Canada → United States
13.7%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Store <5°C; provide thermal decomposition data (onset 130°C)
• UN 3335 hazard class with phosphorus compound specific markings
• Include reaction yield data (>90% for ketone→thioketone) for technical validation