Diethyl Ethylphosphonate 98% Technical Grade from Mexico
Technical grade diethyl ethylphosphonate at 98% purity is used in industrial synthesis of organophosphorus compounds and as a flame retardant additive precursor. Classified under HTS 2931.43.00.00 as the specific non-halogenated organo-phosphorus derivative, even with minor impurities allowed per Chapter 29 notes. Supplied in industrial drums for chemical manufacturing.
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
• Submit Certificate of Analysis (CoA) specifying minimum 98% purity to distinguish from mixtures classifiable elsewhere
• Declare exact phosphonate content and confirm absence of halogen substitution via NMR or GC-MS data
• Comply with TSCA import certification requirements for new chemical substances