SMILES:

CCCCC1=NC2=C(N1CCN(CC)CC)C=CC(=C2)C=CC(=O)NO
Pracinostat (SB939) Chemical Structure
Chemical Structure
Check the Pracinostat (SB939) product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Chemical Information

IUPAC Name (E)-3-[2-butyl-1-[2-(diethylamino)ethyl]benzimidazol-5-yl]-N-hydroxyprop-2-enamide
CAS Number 929016-96-6
Molecular Formula

C20H30N4O2
Molecular Weight (MW) 358.48
SMILES CCCCC1=NC2=C(N1CCN(CC)CC)C=CC(=C2)C=CC(=O)NO
InChIKey JHDKZFFAIZKUCU-ZRDIBKRKSA-N

How to Prepare Stock Solution?

Concentration Volume Mass
🧮 Molarity Calculator

Solubility

Batch:
All in vitro solubility values are batch-tested experimental data (non-literature values).
Solvent Solubility & Note
DMSO 72 mg/mL (200.84 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO. The recommended stock concentration is 10 mM in DMSO.)
Ethanol 27 mg/mL
Water 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.