Methyprylon USP Reference Standard from China
Certified USP reference standard of Methyprylon, a piperidinedione sedative-hypnotic, provided for quality control and analytical testing in pharmaceutical labs. Falls under HTS 2933.72.00.00 as specifically named heterocyclic lactam compound. Supplied in precise milligram quantities for calibration purposes.
Duty Rate — China → 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
• Ship with tamper-evident seals and include USP certificate to verify reference standard authenticity
• Declare exact quantity (typically <1g) and 'for laboratory use only' to qualify for research import exemptions
• Check DEA scheduling status as methyprylon derivatives may require import permit despite reference standard status