Dimethyl Phosphite Reagent Grade from Mexico
Reagent-grade dimethyl phosphite (ACS spec) for laboratory use is classified as a phosphite ester in HTS 2920.21.00.00 under chapter note (a). Ideal for R&D in phosphonate chemistry.
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
• Include lot-specific purity certs; small qty exempt from some hazmat but label anyway; DEA watch if downstream narcotics