CAS No. 100643-71-8

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

Chemical Information

CAS Number 100643-71-8
Molecular Formula

C19H19ClN2

Molecular Weight (MW) 310.82
SMILES C1CC2=C(C=CC(=C2)Cl)C(=C3CCNCC3)C4=C1C=CC=N4

Ordering Information

Biological Activity

Desloratadine is a potent antagonist of the human histamine H1 receptor with an IC50 of 51 nM. By inhibiting histamine H1 receptor activity, it blocks downstream histamine-mediated signaling pathways, suppressing inflammatory mediator release, mast cell activation, and vascular permeability. These actions lead to the inhibition of allergic inflammatory responses and cutaneous anaphylaxis in preclinical models.

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
Ethanol 62 mg/mL
DMSO 26 mg/mL (83.64 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO. The recommended stock concentration is 10 mM in DMSO.)
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).

Aliquotting Service

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Note: Technical data last updated: Sep 1, 2026.