CAS No. 99873-43-5

Batch: Purity:99.88
Droxinostat Chemical Structure
Chemical Structure
Check the Droxinostat product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Chemical Information

IUPAC Name 4-(4-chloro-2-methylphenoxy)-N-hydroxybutanamide
CAS Number 99873-43-5
Molecular Formula

C11H14ClNO3

Molecular Weight (MW) 243.69
SMILES CC1=C(C=CC(=C1)Cl)OCCCC(=O)NO
InChIKey JHSXDAWGLCZYSM-UHFFFAOYSA-N

Ordering Information

Biological Activity

Droxinostat is a selective histone deacetylase (HDAC) inhibitor targeting HDAC8 (IC50 = 1.46 μM), HDAC6 (IC50 = 2.47 μM), and HDAC3 (IC50 = 16.9 μM). By selectively inhibiting these HDAC isoforms, droxinostat enhances caspase activation and sensitizes malignant cell populations to FAS- and Apo2L/TRAIL-induced apoptosis through the extrinsic death receptor signaling pathway.

How to Prepare Stock Solution?

Concentration Volume Mass
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🧮 Molarity Calculator

Solubility

Batch:
All in vitro solubility values are batch-tested experimental data (non-literature values).
Solvent Solubility & Note
DMSO 49 mg/mL (201.07 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO. The recommended stock concentration is 10 mM in DMSO.)
Ethanol 49 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).

Aliquotting Service

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