Cyclopentyl-(Dibutylamino)propylidene Phosphonamidic Fluoride Methyl Salt from Mexico
Alkylated salt form of cyclopentyl-derived phosphonamidic fluoride with dibutylamino group (C4 chains), fitting HTS 2931.59.0030 inclusion of corresponding salts. Used in asymmetric synthesis where chirality at phosphorus is critical. Chapter notes confirm salts classified with parent fluoride.
Duty Rate — Mexico → United States
13.7%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Provide chirality specification (R/S at P) and ee% for research chemical imports
• Customs may require proof alkyl chains ≤C10 via GC-MS of hydrolyzed derivatives