Oxomemazine Base from Mexico
Oxomemazine, a phenothiazine antihistamine with sedative properties, imported as free base API. Classified in HTS 2934.30.27.00 as chemically defined non-antipsychotic phenothiazine.
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
• Verify free base vs salt form with pKa/solubility data for accurate chemical definition
• Include stability studies proving non-degradation of phenothiazine ring per Chapter 29
• Document EU vs US pharmacopeia equivalence for multinational imports