3-(Hydroxymethylphosphinyl)-1-propanoic acid, 2-hydroxyethyl ester from China
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 — China → United States
35%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
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