Phosphonamidofluoridic Acid, Methyl-, Bis(diethylamino)methylene Ester from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, 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