Ethyl (R)-Quizalofop Technical Grade from China
The R-enantiomer of 2-[4-[(6-chloroquinoxalin-2-yl)oxy]phenoxy]propanoic acid ethyl ester, known as (R)-quizalofop-ethyl, is a high-purity chiral herbicide active ingredient. Classified under HTS 2933.99.0200 due to its specific named heterocyclic structure with nitrogen-only heteroatoms in the aromatic quinoxaline ring. Used in enantiopure formulations for enhanced selectivity in soybean and cotton weed control.
Duty Rate — China → United States
112.5%
Rate breakdown
9903.04.60100%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
Import Tips
• Verify enantiomeric purity via HPLC analysis for customs; include TSCA certification if for non-pesticide R&D; watch for quota restrictions on agrochemicals