Mecoprop-p (4-(4-Chloro-2-methylphenoxy)butyric acid enantiomer) from Canada
The herbicidally active enantiomer of 4-(4-chloro-2-methylphenoxy)butyric acid, used in selective weed control formulations. Classifies under HTS 2918.99.1800 as the specifically named pesticide compound despite stereospecificity. Meets chapter 29 requirements for chemically defined aromatic oxygen-function acids.
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Provide chiral purity documentation (e.g
• HPLC analysis) to confirm identity with named compound
• Register with EPA as technical grade active ingredient; retail formulations require separate approval
• Monitor for racemization during storage/transport which could trigger reclassification as mixture