Triethylphosphite from Mexico
Triethylphosphite (P(OEt)3) is an organophosphorus ester used in the synthesis of pesticides and flame retardants. It qualifies under HTS 2931.49.00 as a non-halogenated organo-phosphorus derivative, being a separate chemically defined compound per Chapter 29 note (a).
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
• Provide CAS number (122-52-1) and molecular formula verification on commercial invoice
• For pesticide intermediates, include end-use statements to avoid TSCA Section 13 restrictions
• Confirm no added anti-dusting agents render it specific-use per Chapter 29 note (g)