Ergocristine Methanesulfonate Salt from Mexico
Ergocristine methanesulfonate is a salt derivative of lysergic acid-containing ergot alkaloid from rye ergot, falling under HTS 2939.63.00.00. This chemically defined organic compound is used in pharmaceutical research for its vasoconstrictive properties.
Duty Rate — Mexico → United States
100%
Rate breakdown
9903.04.60100%Pharmaceuticals Annex IV: patented pharma articles — 100% floor rate
9903.05.860%Universal product exemption (U.S. note 52(b))
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
• Verify exact chemical structure matches lysergic acid salt definition per chapter notes
• Include Material Safety Data Sheets (MSDS) detailing toxicity and handling precautions
• Check for additional EPA TSCA registration requirements for new chemical substances