Norephedrine (Norpseudoephedrine) Research Chemical from Canada
High-purity norephedrine hydrochloride (>99%) sold to research institutions studying sympathomimetic pathways. Classified HTS 2939.44.00.00 as synthetic alkaloid salt. Used in neuroscience and pharmacology structure-activity studies.
Duty Rate — Canada → United States
100%
Rate breakdown
9903.04.60100%Pharmaceuticals Annex IV: patented pharma articles — 100% floor rate
9903.05.860%Universal product exemption (U.S. note 52(b))
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Research chemicals need end-user statement; small quantities (<1g) still face full chemical control