Molecular Weight: 401.40 g/mol

acalisib (GS-9820) Chemical Structure
Chemical Structure
Check the acalisib (GS-9820) product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

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 80 mg/mL (199.3 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).

Chemical Information

IUPAC Name 6-fluoro-3-phenyl-2-[(1S)-1-(7H-purin-6-ylamino)ethyl]quinazolin-4-one
CAS Number 870281-34-8
Molecular Formula

C21H16FN7O
Molecular Weight (MW) 401.40
SMILES CC(C1=NC2=C(C=C(C=C2)F)C(=O)N1C3=CC=CC=C3)NC4=NC=NC5=C4NC=N5
InChIKey DOCINCLJNAXZQF-LBPRGKRZSA-N

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