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Thymidine Monophosphate (dTMP) from China

dTMP is a DNA precursor nucleotide used in replication studies and antiviral synthesis. Falls under HTS 2934.99.39.00 as an aromatic nucleic acid specified in additional U.S. note 3.

Duty Rate — China → 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

Provide deoxyribose confirmation via enzymatic digestion analysis

Use nuclease-free water reconstitution instructions

Declare polymerase chain reaction (PCR) grade if applicable