CAS No. 64461-82-1

Batch: Purity:99.87
Tizanidine HCl Chemical Structure
Chemical Structure
Check the Tizanidine HCl product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Chemical Information

CAS Number 64461-82-1
Molecular Formula

C9H8ClN5S.HCl

Molecular Weight (MW) 290.17
SMILES C1CN=C(N1)NC2=C(C=CC3=NSN=C32)Cl.Cl

Ordering Information

Biological Activity

Tizanidine HCl is a centrally acting α2-adrenergic receptor agonist. It selectively activates α2-adrenergic receptors to inhibit the presynaptic release of noradrenaline and excitatory amino acids from central nervous system noradrenergic neurons. Consequently, tizanidine suppresses polysynaptic spinal reflex activity and reduces spinal interneuron pathway signaling, resulting in attenuated motor neuron excitability and reduced muscle spasticity. [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
Water 15 mg/mL
DMSO 10 mg/mL (34.46 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.