n-Propyl Methylphosphonate from China
This compound has phosphorus attached to one methyl group and one n-propyl group, fitting HTS 2930.90.9225's narrow definition. Serves as a specialty solvent and reaction intermediate in pharmaceutical synthesis. Structure confirmed by P-NMR spectroscopy.
Duty Rate — China → United States
100%
Rate breakdown
9903.04.6096.3%Pharmaceuticals Annex IV: patented pharma articles — 100% floor rate
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Declare exact alkyl chain length; n-propyl vs iso-propyl determines subheading precision
• Pharma-grade requires USP/EP certificates; technical grade may face lower duties but stricter safety rules
• Monitor REACH compliance for EU transshipment; affects US import documentation requirements