CAS No. 55268-74-1

Batch: Purity:99.83
Praziquantel Chemical Structure
Chemical Structure
Check the Praziquantel product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Chemical Information

IUPAC Name 2-(cyclohexanecarbonyl)-3,6,7,11b-tetrahydro-1H-pyrazino[2,1-a]isoquinolin-4-one
CAS Number 55268-74-1
Molecular Formula

C19H24N2O2

Molecular Weight (MW) 312.41
SMILES C1CCC(CC1)C(=O)N2CC3C4=CC=CC=C4CCN3C(=O)C2
InChIKey FSVJFNAIGNNGKK-UHFFFAOYSA-N

Ordering Information

Biological Activity

Praziquantel is a synthetic anthelmintic agent effective against flatworms, including schistosomes. It increases the permeability of parasite cell membranes to calcium ions, leading to rapid intracellular calcium influx. This process induces severe muscle contraction, paralysis, and tegumental damage in susceptible parasites. Consequently, paralyzed parasites are dislodged from host tissue sites and subsequently cleared or destroyed by host immune mechanisms. [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 63 mg/mL (201.65 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO. The recommended stock concentration is 10 mM in DMSO.)
Ethanol 63 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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Note: Technical data last updated: Sep 1, 2026.