Diethyl Chloromethylphosphonate from Mexico
This phosphonate ester with chloromethyl substitution serves as a pharmaceutical intermediate and reagent in organic synthesis. HTS 2931.59.00 applies due to halogenated organo-phosphorus structure meeting chapter note requirements.
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
• Document CAS registry number 1066-86-8 for customs verification
• Monitor DEA List I chemical status for narcotic precursor potential
• Use nitrogen-blanketed containers to prevent hydrolysis