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Metyrapone from Mexico

Metyrapone, containing a methyl 1-(2-pyridyl)-1-propanone structure, inhibits cortisol synthesis in Cushing's syndrome treatment. HTS 2933.39.41.00 applies for its pyridine ring as a drug per Chapter 29 heterocyclic rules. Pharmaceutical bulk powder for API synthesis.

Duty Rate — Mexico → United States

16.5%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico

Import Tips

Ketone functionality confirmation via IR spectroscopy supporting pyridine classification

Specify diagnostic/therapeutic end-use to avoid research chemical reclassification

Light-sensitive powder; transport in amber containers with stability data