SMILES:

CC1=C(C2=NC3=C([NH]2)C4=CC=CN=C4C5=C3C=CC=N5)C6=C([NH]1)C=CC(=C6)F
APTO-253 Chemical Structure
Chemical Structure
Check the APTO-253 product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Chemical Information

IUPAC Name 2-(5-fluoro-2-methyl-1H-indol-3-yl)-1H-imidazo[4,5-f][1,10]phenanthroline
CAS Number 916151-99-0
Molecular Formula

C22H14FN5
Molecular Weight (MW) 367.38
SMILES CC1=C(C2=NC3=C([NH]2)C4=CC=CN=C4C5=C3C=CC=N5)C6=C([NH]1)C=CC(=C6)F
InChIKey NIRXBXIPHUTNNI-UHFFFAOYSA-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 73 mg/mL (198.7 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.