Date published: 2026-5-13

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Trifluorothymine (CAS 54-20-6)

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Alternate Names:
5-Trifluoromethyluracil
CAS Number:
54-20-6
Molecular Weight:
180.08
Molecular Formula:
C5H3F3N2O2
Supplemental Information:
This is classified as a Dangerous Good for transport and may be subject to additional shipping charges.
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
* Refer to Certificate of Analysis for lot specific data.

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Trifluorothymine is a crystalline solid that is insoluble in water but soluble in organic solvents such as ethanol and dimethyl sulfoxide. It is an intermediate in the synthesis of tipiracil + trifluridine. It is a synthetic nucleoside analog of thymine. Used in scientific experiments to study the structure and function of DNA and RNA molecules.


Trifluorothymine (CAS 54-20-6) References

  1. Influence of radiation sterilization on the stability of trifluorothymidine.  |  Horsch, P., et al. 2001. Int J Pharm. 222: 205-15. PMID: 11427351
  2. FLUORINATED PYRIMIDINES. XIX. SOME BIOLOGICAL EFFECTS OF 5-TRIFLUOROMETHYLURACIL AND 5-TRIFLUOROMETHYL-2'-DEOXYURIDINE ON ESCHERICHIA COLI AND BACTERIOPHAGE T4B.  |  GOTTSCHLING, H. and HEIDELBERGER, C. 1963. J Mol Biol. 7: 541-60. PMID: 14079593
  3. SYNTHESES OF 5-TRIFLUOROMETHYLURACIL AND 5-TRIFLUOROMETHYL-2'-DEOXYURIDINE.  |  HEIDELBERGER, C., et al. 1964. J Med Chem. 7: 1-5. PMID: 14186018
  4. Growth inhibition of cells in cultures and of vaccinia virus infected HeLa cells by derivatives of trifluorothymidine.  |  Parkhurst, JR., et al. 1976. Chemotherapy. 22: 221-31. PMID: 178485
  5. Molecular structure and effects of intermolecular hydrogen bonding on the vibrational spectrum of trifluorothymine, an antitumor and antiviral agent.  |  Cırak, C. and Koç, N. 2012. J Mol Model. 18: 4453-64. PMID: 22643971
  6. Unified Total Synthesis of Polyoxins J, L, and Fluorinated Analogues on the Basis of Decarbonylative Radical Coupling Reactions.  |  Fujino, H., et al. 2017. Angew Chem Int Ed Engl. 56: 11865-11869. PMID: 28727238
  7. Catalyst-free and visible light promoted trifluoromethylation and perfluoroalkylation of uracils and cytosines.  |  Huang, Y., et al. 2018. Chem Commun (Camb). 54: 13662-13665. PMID: 30382250
  8. A bioequivalence study of trifluridine/tipiracil tablets in Chinese metastatic colorectal cancer patients under fed conditions.  |  Su, HC., et al. 2023. Cancer Chemother Pharmacol. 91: 167-177. PMID: 36622402
  9. Determination of labile trifluoromethyl compounds with a fluoride--ion electrode: differential analysis of 5-trifluoromethyluracil and 5-trifluoromethyl-2'-deoxyuridine.  |  Rogers, WI. and Wilson, JA. 1969. Anal Biochem. 32: 31-7. PMID: 5398266
  10. Prevention of 5-fluorouracil-caused growth inhibition in Sordaria fimicola.  |  Schoen, HF. and Berech, J. 1977. Antimicrob Agents Chemother. 11: 234-9. PMID: 848926

Ordering Information

Product NameCatalog #UNITPriceQtyFAVORITES

Trifluorothymine, 250 mg

sc-258298
250 mg
$43.00