CAS No. 667463-62-9

Batch: Purity:99.9
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GSK-3 Inhibitor IX (BIO) Chemical Structure
Chemical Structure
Check the GSK-3 Inhibitor IX (BIO) product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Chemical Information

IUPAC Name 6-bromo-3-(3-nitroso-1H-indol-2-yl)-1H-indol-2-ol
CAS Number 667463-62-9
Molecular Formula

C16H10BrN3O2
Molecular Weight (MW) 356.17
SMILES C1=CC=C2C(=C1)C(=C(N2)C3=C(NC4=C3C=CC(=C4)Br)O)N=O
InChIKey SAQUSDSPQYQNBG-UHFFFAOYSA-N

Biological Activity

GSK-3 Inhibitor IX (BIO) is a potent, ATP-competitive glycogen synthase kinase-3 inhibitor targeting GSK-3α/β with an IC50 of 5 nM, displaying greater than 16-fold selectivity over CDK5. By inhibiting GSK-3, BIO modulates Wnt/β-catenin signaling and regulates downstream cellular processes, including cell cycle progression, stem cell self-renewal, and apoptosis induction 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 71 mg/mL (199.34 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO. The recommended stock concentration is 10 mM in DMSO.)
Ethanol 6 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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Reference

[1] Meijer L, et al. Chem Biol. 2003;10(12):1255-66.

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