Barbital (Barbitone) from Canada
Barbital, the diethyl derivative of barbituric acid, historically used as a sedative. Pure chemical form classified under HTS 2933.54.00.00 as a malonylurea derivative.
Duty Rate — Canada → United States
100%
Rate breakdown
9903.04.6096.3%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
• Commonly imported as reference standard; specify analytical use
• Small quantities typically exempt from some documentation
• Include CAS number (57-44-3) on commercial invoice