Barbital Sodium Crystals from Mexico
Barbital sodium, the first synthesized barbiturate, contains pyrimidine ring and is specifically named in HTS 2933.53.00.00. Used in research and legacy formulations. Imported as crystalline powder meeting pharmacopeia standards.
Duty Rate — Mexico → United States
100%
Rate breakdown
9903.04.60100%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
• Research imports may qualify for duty-free under HTSUS 9810.00.75 with IRB approval
• Stabilizer content <1% required; higher levels violate Chapter 29 note 2(f)
• Declare exact water content; hydrates may affect duty weight calculations