3-(Hydroxymethylphosphinyl)-1-propanoic acid, 2-hydroxyethyl ester from Mexico
This organo-phosphorus compound, also known as HPPA hydroxyethyl ester, features phosphorus directly bonded to carbon and is used as a phosphonate intermediate in agrochemical synthesis and flame retardants. HTS 2931.90.70.00 specifically lists this compound among named organo-inorganic chemicals per the tariff description.
Duty Rate — Mexico → United States
10%
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 NMR or mass spectrometry data confirming phosphinyl structure to distinguish from sulfonated derivatives excluded from heading 2931
• Classify salts of this acid under same heading per Chapter 29 note 3(C)(1); declare counterion if applicable
• Check REACH compliance for EU transshipments as phosphonate intermediates face registration requirements