Levobunolol Base from China
Levobunolol base, an aromatic amino-alcohol-phenol derivative structurally analogous to listed phenylephrine, used as beta-blocker intermediate for glaucoma treatment. Classified here under the specific enumerated compounds provision of HTS 2922.50.10.00.
Duty Rate — China → United States
100%
Rate breakdown
9903.04.6094.2%Pharmaceuticals Annex IV: patented pharma articles — 100% floor rate
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
• Include pharmacopeial compliance (USP/EP) certificates for purity >98%
• DEA monitoring for beta-blocker precursors; declare research/pharma use
• Chiral purity documentation if enantiopure form imported