Epinastine (Synonyms: WAL801)

Cat. No.: HY-B0640 Purity: ≥98.0%: FAQs
Data Sheet SDS COA Handling Instructions

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Epinastine (WAL801) is an antihistamine and mast cell stabilizer. Epinastine is a potent, selective and orally-active histamine H1 receptor antagonist. Epinastine also inhibits IL-8 release and has an antiallergic action.

For research use only. We do not sell to patients.

Epinastine Chemical Structure

CAS No. : 80012-43-7

Size	Price	Stock	Quantity

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Solid + Solvent
10 mM * 1 mL in DMSO ready for reconstitution	USD 106	In-stock	Estimated Time of Arrival: December 31
Solution
10 mM * 1 mL in DMSO	USD 106	In-stock	Estimated Time of Arrival: December 31
Solid
50 mg	USD 96	In-stock	Estimated Time of Arrival: December 31
100 mg	USD 132	In-stock	Estimated Time of Arrival: December 31
500 mg	USD 540	In-stock	Estimated Time of Arrival: December 31
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Other Forms of Epinastine:

Epinastine hydrochloride In-stock
Epinastine-¹³C,d₃ hydrobromide Get quote

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Purity & Documentation
References
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Description

In Vitro

Epinastine is able to displace specific [³H]NC-5Z binding at low concentrations in the locust nervous tissue. Epinastine binds to the honey bees neuronal octopamine receptor with K_i of 1.1 nM. Epinastine antagonises octopamine-induced cAMP formation in the insect brain^[2].
Epinastine causes an inhibition of histamine release from rat peritoneal mast cells induced by both antigen-antibody reaction and compound 48/80. Epinastine is similarly effective in inhibiting compound 48/80-induced histamine release not only from isolated rat peritoneal mast cells but also from rat mesenterial pieces. Epinastine is effective in inhibiting not only Ca²⁺ uptake into lung mast cells in actively sensitized guinea pigs but also Ca²⁺ release from the intracellular Ca store of rat peritoneal mast cells exposed to both compound 48/80 and substance P^[3].
Epinastine shows a dose- and time-dependent suppressive effect on IL-8, one of the chemokines for eosinophils, released from eosinophils isolated from atopic diseases^[4].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

In Vivo

Epinastine shows a high affinity to H1-receptors in receptor binding studies in the guinea pig ileum. Epinastine inhibits histamine-induced reactions in the skin or the lung of rats, dogs and guinea pigs^[1].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Clinical Trial

Molecular Weight

249.31

Formula

C₁₆H₁₅N₃

CAS No.

80012-43-7

Appearance

Solid

Color

White to off-white

SMILES

NC1=NCC2N1C3=CC=CC=C3CC4=CC=CC=C24

Shipping

Room temperature in continental US; may vary elsewhere.

Storage

4°C, protect from light, stored under nitrogen

*In solvent : -80°C, 6 months; -20°C, 1 month (protect from light, stored under nitrogen)

Solvent & Solubility

In Vitro:

DMSO : ≥ 50 mg/mL (200.55 mM; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

H₂O : < 0.1 mg/mL (insoluble)

*"≥" means soluble, but saturation unknown.

Preparing
Stock Solutions

Concentration Solvent Mass	1 mg	5 mg	10 mg

1 mM	4.0111 mL	20.0554 mL	40.1107 mL
5 mM	0.8022 mL	4.0111 mL	8.0221 mL
10 mM	0.4011 mL	2.0055 mL	4.0111 mL

View the Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (protect from light, stored under nitrogen). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

Molarity Calculator
Dilution Calculator

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

Concentration _(start) × Volume _(start) = Concentration _(final) × Volume _(final)

This equation is commonly abbreviated as: C₁V₁ = C₂V₂

In Vivo:

Select the appropriate dissolution method based on your experimental animal and administration route.

For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for in vivo experiments, it is recommended to prepare freshly and use it on the same day.
The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.

Protocol 1

Add each solvent one by one: 10% DMSO 40% PEG300 5% Tween-80 45% Saline
Solubility: ≥ 2.5 mg/mL (10.03 mM); Clear solution

This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown).
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.
Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
Protocol 2

Add each solvent one by one: 10% DMSO 90% (20% SBE-β-CD in Saline)
Solubility: ≥ 2.5 mg/mL (10.03 mM); Clear solution

This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown).
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 900 μL 20% SBE-β-CD in Saline, and mix evenly.
Preparation of 20% SBE-β-CD in Saline (4°C, storage for one week): 2 g SBE-β-CD powder is dissolved in 10 mL Saline, completely dissolve until clear.
Protocol 3

Add each solvent one by one: 10% DMSO 90% Corn Oil
Solubility: ≥ 2.5 mg/mL (10.03 mM); Clear solution

This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown). If the continuous dosing period exceeds half a month, please choose this protocol carefully.
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 900 μL Corn oil, and mix evenly.

In Vivo Dissolution Calculator

Please enter the basic information of animal experiments:

Dosage

mg/kg

Animal weight
(per animal)

Dosing volume
(per animal)

μL

Number of animals

Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.

Please enter your animal formula composition:

DMSO +

Tween-80 +

Saline

Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.

The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).

Calculation results:

Working solution concentration: mg/mL

Method for preparing stock solution: mg drug dissolved in μL DMSO (Stock solution concentration: mg/mL).

*In solvent : -80°C, 6 months; -20°C, 1 month (protect from light, stored under nitrogen)

The concentration of the stock solution you require exceeds the measured solubility. The following solution is for reference only. If necessary, please contact MedChemExpress (MCE).

Method for preparing in vivo working solution for animal experiments: Take μL DMSO stock solution, add μL . μL , mix evenly, next add μL Tween 80, mix evenly, then add μL Saline.

If the continuous dosing period exceeds half a month, please choose this protocol carefully.

Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.

Purity & Documentation

Purity: ≥98.0%

Select Batch:

Data Sheet (283 KB) SDS (0 KB)

COA (260 KB) HNMR (246 KB)

Handling Instructions (2659 KB)

References

[1]. Fugner, A., et al., In vitro and in vivo studies of the non-sedating antihistamine epinastine. Arzneimittelforschung, 1988. 38(10): p. 1446-53. [Content Brief]

[2]. Roeder, T., J. Degen, and M. Gewecke, Epinastine, a highly specific antagonist of insect neuronal octopamine receptors. Eur J Pharmacol, 1998. 349(2-3): p. 171-7. [Content Brief]

[3]. Kamei, C., et al., Antiallergic effect of epinastine (WAL 801 CL) on immediate hypersensitivity reactions: (I). Elucidation of the mechanism for histamine release inhibition. Immunopharmacol Immunotoxicol, 1992. 14(1-2): p. 191-205. [Content Brief]

[4]. Kohyama, T., et al., A novel antiallergic drug epinastine inhibits IL-8 release from human eosinophils. Biochem Biophys Res Commun, 1997. 230(1): p. 125-8. [Content Brief]

Complete Stock Solution Preparation Table

Optional Solvent	Concentration Solvent Mass	1 mg	5 mg	10 mg	25 mg

DMSO	1 mM	4.0111 mL	20.0554 mL	40.1107 mL	100.2768 mL
	5 mM	0.8022 mL	4.0111 mL	8.0221 mL	20.0554 mL
	10 mM	0.4011 mL	2.0055 mL	4.0111 mL	10.0277 mL
	15 mM	0.2674 mL	1.3370 mL	2.6740 mL	6.6851 mL
	20 mM	0.2006 mL	1.0028 mL	2.0055 mL	5.0138 mL
	25 mM	0.1604 mL	0.8022 mL	1.6044 mL	4.0111 mL
	30 mM	0.1337 mL	0.6685 mL	1.3370 mL	3.3426 mL
	40 mM	0.1003 mL	0.5014 mL	1.0028 mL	2.5069 mL
	50 mM	0.0802 mL	0.4011 mL	0.8022 mL	2.0055 mL
	60 mM	0.0669 mL	0.3343 mL	0.6685 mL	1.6713 mL
	80 mM	0.0501 mL	0.2507 mL	0.5014 mL	1.2535 mL
	100 mM	0.0401 mL	0.2006 mL	0.4011 mL	1.0028 mL

Epinastine Related Classifications

Help & FAQs

Do most proteins show cross-species activity?
Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

Keywords:

Epinastine80012-43-7WAL801WAL 801WAL-801Histamine ReceptorAntihistaminevertebrateinsectneuronalantiallergicmastcellInhibitorinhibitorinhibit

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