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
3.7%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
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