SMILES:

Cl.NCCN[S](=O)(=O)C1=C2C=CC=C(Cl)C2=CC=C1
A-3 hydrochloride Chemical Structure
Chemical Structure
Check the A-3 hydrochloride product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Chemical Information

CAS Number 78957-85-4
Molecular Formula

C12H13ClN2O2S.ClH
Molecular Weight (MW) 321.22
SMILES Cl.NCCN[S](=O)(=O)C1=C2C=CC=C(Cl)C2=CC=C1

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 64 mg/mL (199.24 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO. The recommended stock concentration is 10 mM in DMSO.)
Water 64 mg/mL
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.