Dimethyl Phosphite (DMP) from Canada
Dimethyl phosphite is a colorless liquid organophosphorus compound with the formula (CH3O)2P(O)H, classified under HTS 2920.21.00.00 as a phosphite ester of an inorganic acid of nonmetal (phosphorous acid). It serves as a key reagent in organic synthesis for producing phosphonate esters and flame retardants.
Duty Rate — Canada → United States
13.7%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Verify purity levels (>98%) via Certificate of Analysis to meet chemical import standards; ensure proper Hazard Communication labeling for corrosive properties; declare as pure compound to avoid mixture reclassification under Chapter 38