CAS No. 70458-95-6

Batch: Purity:99.74
Pefloxacin Mesylate Chemical Structure
Chemical Structure
Check the Pefloxacin Mesylate product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Chemical Information

CAS Number 70458-95-6
Molecular Formula

C17H20FN3O3.CH4O3S

Molecular Weight (MW) 429.46
SMILES CCN1C=C(C(=O)C2=CC(=C(C=C21)N3CCN(CC3)C)F)C(=O)O.CS(=O)(=O)O

Ordering Information

Biological Activity

Pefloxacin mesylate is a synthetic fluoroquinolone antibacterial agent that functions as an inhibitor of bacterial DNA gyrase and topoisomerase IV. By inhibiting these essential bacterial enzymes, pefloxacin disrupts DNA replication and transcription pathways, leading to double-stranded DNA fragmentation and rapid bacterial cell death. It exhibits broad-spectrum antibacterial activity against various Gram-negative and Gram-positive bacterial pathogens.

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
Water 67 mg/mL
DMSO 14 mg/mL (32.59 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO. The recommended stock concentration is 10 mM in DMSO.)
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.