Distilled Trimethyl Phosphite 98% from Mexico
Vacuum-distilled trimethyl phosphite at 98% purity for pharmaceutical phosphonate synthesis. HTS 2920.23.00.00 as chemically defined phosphite ester.
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
• FDA prior notice if pharma intermediate; GMP cert for distilled grades
• Test for methanol content (<0.5%) to confirm ester integrity
• Declare CAS 121-45-9 explicitly on commercial invoice