CAS No. 21679-14-1

Batch: Purity:99.96
Fludarabine Chemical Structure
Chemical Structure
Check the Fludarabine product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Chemical Information

IUPAC Name (2R,3S,4S,5R)-2-(6-amino-2-fluoropurin-9-yl)-5-(hydroxymethyl)oxolane-3,4-diol
CAS Number 21679-14-1
Molecular Formula

C10H12FN5O4

Molecular Weight (MW) 285.23
SMILES C1=NC2=C(N=C(N=C2N1C3C(C(C(O3)CO)O)O)F)N
InChIKey HBUBKKRHXORPQB-FJFJXFQQSA-N

Ordering Information

Biological Activity

Fludarabine is a purine nucleoside analog that acts as a STAT1 activation inhibitor and DNA synthesis inhibitor. By selectively suppressing STAT1 protein activation and expression, fludarabine impairs downstream signaling pathways. Consequently, treatment induces cell cycle arrest at the G1 phase, disrupts mitochondrial membrane potential, and triggers caspase-dependent cleavage leading to apoptosis in cancer cells. [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 57 mg/mL (199.83 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO. The recommended stock concentration is 10 mM in DMSO.)
Water Insoluble
Ethanol Insoluble
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.