Methyltriphenylphosphonium Bromide from China
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 — China → United States
137.5%
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
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
9903.88.0425%Except as provided in headings 9903.88.33, 9903.88.34, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(g) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(g)
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