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Quality Control

Batch: Purity: 99.99%

99.99

Related Targets	Adrenergic Receptor AChR 5-HT Receptor COX Calcium Channel Dopamine Receptor GABA Receptor TRP Channel Cholinesterase (ChE) GluR
Other Histamine Receptor Inhibitors	GSK2879552 Dihydrochloride JNJ-7777120 Mianserin HCl Ebastine Astemizole Ciproxifan Maleate Rupatadine Lafutidine Cloperastine hydrochloride Mizolastine

Solubility

In vitro
Batch:

Ethanol : 77 mg/mL

DMSO : 17 mg/mL (44.4 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Water : Insoluble

Molarity Calculator

Mass	Concentration	Volume	Molecular Weight
Mass value Mass unit	Concentration value Concentration unit	Volume value Volume unit	Molecular weight (g/mol)

Dilution Calculator Molecular Weight Calculator

In vivo batch selection In vivo Batch:
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution	5%DMSO 1 Corn oil Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	4.000mg/ml (10.45mM)	Taking the 1 mL working solution as an example, add 50 μL of 80 mg/ml clear DMSO stock solution to 950 μL of corn oil and mix evenly. The mixed solution should be used immediately for optimal results.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution	5%DMSO 1 40%PEG300 2 5%Tween80 3 50%ddH2O Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	3.850mg/ml (10.06mM)	Taking the 1 mL working solution as an example, add 50 μL of 77 mg/ml clarified DMSO stock solution to 400 μL of PEG300, mix evenly to clarify it; add 50 μL of Tween80 to the above system, mix evenly to clarify; then continue to add 500 μL of ddH2O to adjust the volume to 1 mL. The mixed solution should be used immediately for optimal results.
Clear solution	5% DMSO 1 95% Corn oil Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	0.350mg/ml (0.91mM)	Taking the 1 mL working solution as an example, add 50 μL of 7 mg/ml clear DMSO stock solution to 950 μL of corn oil and mix evenly. The mixed solution should be used immediately for optimal results.

In vivo Formulation Calculator (Clear solution)

Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment)

Dosage: mg/kg

Average weight of animals: g

Dosing volume per animal: μL

Number of animals:

Step 2: Enter the in vivo formulation (This is only the calculator, not formulation. Please contact us first if there is no in vivo formulation at the solubility Section.)

% DMSO

%

% Tween 80

% ddH₂O

% DMSO

+

%

Calculation results:

Working concentration: mg/ml;

Method for preparing DMSO master liquid: mg drug pre-dissolved in μL DMSO ( Master liquid concentration mg/mL, Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug. )

Method for preparing in vivo formulation: Take μL DMSO master liquid, next addμL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH₂O, mix and clarify.

Method for preparing in vivo formulation: Take μL DMSO master liquid, next add μL Corn oil, mix and clarify.

Note: 1. Please make sure the liquid is clear before adding the next solvent.
2. Be sure to add the solvent(s) in order. You must ensure that the solution obtained, in the previous addition, is a clear solution before proceeding to add the next solvent. Physical methods such
as vortex, ultrasound or hot water bath can be used to aid dissolving.

Chemical Information, Storage & Stability

Molecular Weight	382.88	Formula	C₂₂H₂₃ClN₂O₂	Storage (From the date of receipt)	3 years-20°Cpowder
CAS No.	79794-75-5	Download SDF		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	SCH29851			SMILES	CCOC(=O)N1CCC(=C2C3=C(CCC4=C2N=CC=C4)C=C(C=C3)Cl)CC1

Read more about storage stability stock solution CAS number SMILES

Mechanism of Action

Targets/IC₅₀/Ki	H1 receptor B(0)AT2 4 μM
In vitro	Lororatadine is identified as a selective inhibitor of B(0)AT2 with an IC50 of 4 μM while being less active or inactive against several other members of the SLC6 family. This compound concentration-dependently inhibits the release of histamine and LTC4 when preincubating before Der p 1 antigen or anti-Fc epsilon RI challenge in human Fc epsilon RI+ cells. It also inhibits (10-40%) histamine, LTC4, and PGD2 release from purified HLMC (16-68%) activated by anti-Fc epsilon RI. This chemical causes concentration-dependent inhibition (10-40%) of histamine, tryptase, LTC4, and PGD2 release from purified HSMC (24-72%) immunologically challenged with anti-Fc epsilon RI. It inhibits significantly IL-6 and IL-8 secretion induced by histamine with a more powerful efficiency of the active metabolite in human umbilical vein endothelial cells (HUVEC). This compound blocks hKv1.5 channels in a concentration-, voltage-, time- and use-dependent manner but only at concentrations much higher than therapeutic plasma levels in man in Ltk- cells transfected with the gene encoding hKv1.5 channels. It inhibits rhinovirus-induced ICAM-1 upregulation in both primary bronchial or transformed (A549) respiratory epithelial cells. This chemical also inhibits ICAM-1 mRNA induction caused by rhinovirus infection in a dose-dependent manner, and they completely inhibits rhinovirus-induced ICAM-1 promoter activation.
References	[1] https://pubmed.ncbi.nlm.nih.gov/25318072/ [2] https://pubmed.ncbi.nlm.nih.gov/9179431/ [3] https://pubmed.ncbi.nlm.nih.gov/9383257/ [4] https://pubmed.ncbi.nlm.nih.gov/9349397/ [5] https://pubmed.ncbi.nlm.nih.gov/11496238/

Clinical Trial Information

(data from https://clinicaltrials.gov, updated on 2026-08-14)

NCT Number	Recruitment	Conditions	Sponsor/Collaborators	Start Date	Phases
NCT07661459	RECRUITING	Solid Tumors	Val Adams	2026-06-26	PHASE2
NCT05263206	RECRUITING	Pruritus	Sanofi	2022-02-15	PHASE3
NCT07300735	RECRUITING	Hematologic Malignancy; Neutropenia; Bone Pain	Alexandria University	2025-03-01
NCT07532993	NOT_YET_RECRUITING	Allergic Rhinitis (AR)	Liaquat National Hospital & Medical College	2026-09	PHASE4
NCT07101445	RECRUITING	Multiple Myeloma	Emory University	2025-09-24	PHASE4
NCT05421416	RECRUITING	Stem Cell Transplant Complications	AHS Cancer Control Alberta	2024-11-28	PHASE2

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Loratadine Histamine Receptor antagonist

Chemical Structure

Molecular Weight: 382.88