Hyperoside (Quercetin-3-O-Galactoside) from Canada
Hyperoside, a quercetin galactoside from Hypericum perforatum, under HTS 2938.90.00.00. Standardized marker for St. John's Wort quality control.
Duty Rate — Canada → United States
13.7%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Specify as USP/NF reference standard for herbal monograph
• Confirm galactose vs glucose sugar moiety
• Test for hyperforin interference in standardization