Methyltriphenylphosphonium Bromide from Canada
Methyltriphenylphosphonium bromide is a phosphonium salt used in Wittig reagent preparation for olefin synthesis. Classified under 2931.90.90.52 as an organo-inorganic compound per Chapter 29 note (C)(1) for organic salts.
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
• Hygroscopic; specify anhydrous grade and include retest date on labeling
• Phosphorus compounds monitored under Chemical Weapons Convention; declare quantities
• Confirm quaternary phosphonium structure to avoid organic phosphorus misclassification