γ-Butyrolactone USP Grade from Canada
USP-grade γ-Butyrolactone is a high-purity lactone meeting pharmaceutical standards, classified as a heterocyclic oxygen-only compound under HTS 2932.20.50.10 per Chapter 29 definitions. Primarily used as an intermediate for synthesizing GABA-related drugs.
Duty Rate — Canada → United States
13.7%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Provide USP certificate of analysis for FDA compliance; ensure List I chemical reporting to DEA; avoid water-dissolved forms unless per Chapter Note (d)