Cytidine Triphosphate (CTP) Disodium Salt from Mexico
CTP disodium salt serves as a substrate in RNA polymerase reactions and pharmaceutical intermediates. It qualifies for HTS 2934.99.39.00 as a chemically defined nucleic acid salt listed in additional U.S. note 3.
Duty Rate — Mexico → United States
100%
Rate breakdown
9903.04.6093.5%Pharmaceuticals Annex IV: patented pharma articles — 100% floor rate
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 molecular weight verification and HPLC purity data in import documentation
• Label shipments with UN number for biochemical substances if applicable
• Confirm research institution affiliation for potential duty exemptions