Methylphosphonic difluoride from China
Methylphosphonic difluoride (CH3P(O)F2) features a phosphorus atom bonded to one methyl group and two fluorine atoms, fitting the specific structural requirement of HTS 2931.59.00.60 for halogenated derivatives with limited carbon attachment. Primarily used in specialty chemical synthesis and as a reagent in pharmaceutical intermediates.
Duty Rate — China → United States
16.2%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Classify under UN 3467 for fluorinated phosphorus compounds and ensure IMCO labeling on all shipping containers
• Provide certificates of analysis confirming single alkyl group structure to match statistical suffix requirements
• Check for CWC (Chemical Weapons Convention) restrictions as some phosphonyl halides have dual-use concerns