CAS No. 16773-42-5

Batch: Purity:99.98
Ornidazole Chemical Structure
Chemical Structure
Check the Ornidazole product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Chemical Information

CAS Number 16773-42-5
Molecular Formula

C7H10ClN3O3

Molecular Weight (MW) 219.63
SMILES CC1=NC=C(N1CC(CCl)O)[N+](=O)[O-]

Ordering Information

Biological Activity

Ornidazole is a synthetic 5-nitroimidazole derivative exhibiting potent antiprotozoal and antibacterial activities against anaerobic microorganisms. Upon entering susceptible cells, its nitro group undergoes metabolic reduction to form short-lived cytotoxic free-radical intermediates. These reactive species interact with microbial DNA to induce strand breakage, inhibit nucleic acid synthesis, and disrupt essential cellular functions, ultimately leading to pathogen cell death.

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 44 mg/mL (200.33 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO. The recommended stock concentration is 10 mM in DMSO.)
Ethanol 44 mg/mL
Water 2 mg/mL
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.