CAS No. 50-91-9

Batch: Purity:99.99
Floxuridine (FUDR) Chemical Structure
Chemical Structure
Check the Floxuridine (FUDR) product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Chemical Information

IUPAC Name 5-fluoro-1-[(2R,4S,5R)-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]pyrimidine-2,4-dione
CAS Number 50-91-9
Molecular Formula

C9H11FN2O5

Molecular Weight (MW) 246.19
SMILES C1C(C(OC1N2C=C(C(=O)NC2=O)F)CO)O
InChIKey ODKNJVUHOIMIIZ-RRKCRQDMSA-N

Ordering Information

Biological Activity

Floxuridine (FUDR) is a pyrimidine analog and antimetabolite prodrug that is rapidly converted into fluorodeoxyuridine monophosphate, a potent inhibitor of thymidylate synthase. By blocking thymidylate synthesis, floxuridine disrupts DNA replication and repair, leading to severe DNA damage and the induction of apoptotic cell death in cancer cells. Additionally, it displays antiviral activity against herpes simplex virus and cytomegalovirus. [1]

How to Prepare Stock Solution?

Concentration Volume Mass
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Solubility

Batch:
All in vitro solubility values are batch-tested experimental data (non-literature values).
Solvent Solubility & Note
DMSO 49 mg/mL (199.03 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO. The recommended stock concentration is 10 mM in DMSO.)
Water 49 mg/mL
Ethanol 10 mg/mL
FAQ
Q: Why does a DMSO stock precipitate in media/saline?
A: It is caused by unheated aqueous media (supersaturation), local solvent shock, or incorrect mixing sequence.
How to fix it?
  • Preheat media/saline to 37°C.
  • Mix rapidly (pipette/vortex) upon addition.
  • For complex mixes, always add the aqueous phase last.
  • Re-dissolve minor precipitates with a 37°C water bath and sonication (≤30 min).

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Note: Technical data last updated: Sep 1, 2026.