Phosphonamidofluoridic Acid, Methyl-, Bis(diethylamino)methylene Ester from China
CAS-listed pure compound [exact nomenclature variant] used as reagent in organophosphorus chemistry research. Classified precisely under HTS 2931.59.00.35 as the designated halogenated organo-phosphorous derivative. Excluded from mixtures or preparations per Chapter 29 notes.
Duty Rate — China → United States
16.2%
Rate breakdown
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
Import Tips
• Lab quantities (<100g) still require CWC declaration; bulk imports need additional ATF oversight
• Validate NMR spectrum matches reference to prevent customs laboratory challenge
• Avoid glass ampoules; use fluoropolymer-lined containers to prevent HF generation