Cinchonine Sulfate from Mexico
Cinchonine sulfate is the sulfate salt of cinchonine alkaloid, used in analytical chemistry as alkaloid precipitant. Classified HTS 2939.20.0050 as other cinchona salt derivative. Typically 98%+ purity.
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
• Include melting point range (255-260°C) verification
• Provide GHS classification for acute toxicity handling