tert-Butyl-(Methylpropylamino)ethylidene Phosphonamidic Fluoride from Mexico
Fluorophosphonamidate featuring tert-butyl (C4) on P and mixed methyl/n-propyl on nitrogen, all ≤C10, precisely matching HTS 2931.59.0030 criteria. Serves as building block for nerve agent analogs or therapeutic phosphonates in medicinal chemistry. The specific P-N=alkylidene-fluoride motif defines classification.
Duty Rate — Mexico → United States
13.7%
Rate breakdown
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
• May require DEA import permit if listed chemical precursor; check Chemical Diversion list annually
• Include synthetic route and purity (>98%) specs to justify 2931 classification vs mixtures