CAS No. 1229-29-4

Batch: Purity:99.92
Doxepin HCl  Chemical Structure
Chemical Structure
Check the Doxepin HCl product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Chemical Information

CAS Number 1229-29-4
Molecular Formula

C19H21NO.HCl

Molecular Weight (MW) 315.84
SMILES CN(C)CCC=C1C2=CC=CC=C2COC3=CC=CC=C31.Cl

Ordering Information

Biological Activity

Doxepin hydrochloride is a tricyclic antidepressant that acts as a potent histamine H1 receptor antagonist and an inhibitor of cytochrome P450 2D6 (CYP2D6) activity. Formulated as a mixture of E-trans and Z-cis stereoisomers, it modulates histaminergic signaling pathways to suppress downstream histamine-mediated cellular responses and alter monoamine neurotransmitter transport mechanisms in neural and metabolic models. [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 (199.46 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO. The recommended stock concentration is 10 mM in DMSO.)
Water 63 mg/mL
Ethanol 63 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).
Note: Technical data last updated: Sep 1, 2026.