Diphenyl Phosphorochloridite from Mexico
Aromatic chloridite ester used as intermediate in pharmaceutical synthesis and organophosphorus chemistry. Although containing chlorine, classified under 2920.90.2000 as phosphoric acid ester derivative, not hydrogen halide ester per chapter exclusion. Chemically defined with P-Cl and P-OPh2 structure.
Duty Rate — Mexico → United States
16.5%
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
• Hazard class 8 (corrosive) requires UN-approved packaging and proper placarding
• Pharma intermediate importers need FDA registration and drug master file references
• Avoid misclassification as acid halide under 2811; ester function takes precedence