Diethylaminoethyl Cyclohexylphosphonite from Mexico
O-cyclohexyl ester variant (C6 cycloalkyl ≤C10) of diethylaminoethyl hydrogen phosphonite, fitting HTS 2931.49.00.08 specifications for alkyl/cycloalkyl esters. Key reagent in Buchwald-Hartwig coupling catalyst preparation.
Duty Rate — Mexico → United States
110%
Rate breakdown
9903.04.6096.3%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Cycloalkyl esters require dimensional chain length certification (total ≤C10 equivalent)
• Register with US chemical inventory (TSCA) prior to import for manufacturing use