CAS No. 33419-42-0

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

Chemical Information

IUPAC Name (5S,5aR,8aR,9R)-5-[[(2R,4aR,6R,7R,8R,8aS)-7,8-dihydroxy-2-methyl-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-6-yl]oxy]-9-(4-hydroxy-3,5-dimethoxyphenyl)-5a,6,8a,9-tetrahydro-5H-[2]benzofuro[6,5-f][1,3]benzodioxol-8-one
CAS Number 33419-42-0
Molecular Formula

C29H32O13

Molecular Weight (MW) 588.56
SMILES CC1OCC2C(O1)C(C(C(O2)OC3C4COC(=O)C4C(C5=CC6=C(C=C35)OCO6)C7=CC(=C(C(=C7)OC)O)OC)O)O
InChIKey VJJPUSNTGOMMGY-MRVIYFEKSA-N

Ordering Information

Biological Activity

Etoposide is a semisynthetic podophyllotoxin derivative that acts as a topoisomerase II inhibitor. By stabilizing the transient topoisomerase II-cleaved DNA complex, it prevents DNA ligation, leading to the accumulation of single- and double-strand DNA breaks. This disruption of DNA synthesis triggers cell cycle arrest and downstream cellular responses, including the induction of autophagy, mitophagy, and 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 100 mg/mL (169.9 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.