Cat. No.: HY-B0446

Naphazoline hydrochloride

(Synonyms: Naphthazoline hydrochloride)

1 Cited Publications

Customer Review

Based on 1 publication(s) in Google Scholar

Naphazoline (Naphthazoline) hydrochloride is a potent α-adrenergic receptor agonist. Naphazoline hydrochloride reduces vascular hyperpermeability and promotes vasoconstriction. Naphazoline hydrochloride reduces the levels of inflammatory factors (TNF-α, IL-1β and IL-6), cytokines (IFN-γ and IL-4), IgE, GMCSF, and NGF. Naphazoline hydrochloride can be used for non-bacterial conjunctivitis research.

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

Purity: 99.38%
CAS No.: 550-99-2
Formula: C₁₄H₁₅ClN₂
Molecular Weight:246.74

Storage:

4°C, sealed storage, away from moisture

* In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)

Naphazoline hydrochloride Chemical Structure

CAS No.: 550-99-2

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Top Publications Citing

Use of MCE Products

Fluorescent Dye

Strong Fluorescence Signal / Multi-Disciplinary Applications / High Fluorescence Specificity

Biological Activity
- Description
- IC₅₀ & Target
- In Vivo
- Clinical Trial
Chemical Information
Publications (1)
Solvent & Solubility
- In Vitro
- In Vivo
Purity & Documentation
References
Help & FAQs
Classifications
Bioz

Biological Activity

Description

IC₅₀ & Target

IL-1β

IL-6

IL-4

All Adrenergic Receptor Isoforms :

All TNF Receptor Isoforms :

All Interleukin Related Isoforms :

All VEGFR Isoforms :

In Vivo

Naphazoline hydrochloride (0.2 mg/kg, 10 μl per eye; IP, once) reduces histamine or antigen-induced conjunctival vascular hyperpermeability in mice, and reduces conjunctivitis in mice via effects on inflammation, NGF and VEGF^[1].

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

Animal Model:

Female wild-type BALB/c mice (4-5 weeks, 18 ± 2 g, n=8/group, allergic conjunctivitis mouse model established using histamine or an antigen (ovalbumin))^[1]
Dosage:

0.2 mg/mL, 10 µl per eye
Administration:

Intraperitoneal injection (IP), once
Result:

Significantly suppressed conjunctival dye leakage in mice with histamine or antigen‑induced conjunctival vascular hyperpermeability. Reduced inflammatory reactions and the levels of IL-1β, IL-6, IFN-γ, and IL-4. Reduced the levels of IgE, GMCSF, NGF and VEGF in antigen-induced conjunctival vascular hyperpermeability mice.

Clinical Trial

NCT Number	Sponsor	Condition	Start Date	Phase A549
NCT01329991	Plexxikon\|		2011-05	PHASE1

Chemical Information

CAS No. 550-99-2
Appearance Solid
Molecular Weight 246.74
Formula C₁₄H₁₅ClN₂
Color White to off-white
SMILES

C1(CC2=NCCN2)=CC=CC3=CC=CC=C13.Cl
Synonyms

Naphthazoline hydrochloride
Shipping

Room temperature in continental US; may vary elsewhere.
Storage

4°C, sealed storage, away from moisture

* In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)

Publications (1)

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Journal Impact Factor

Biomed Pharmacother

Identification of the atypical antipsychotic Asenapine as a direct survivin inhibitor with anticancer properties and sensitizing effects to conventional therapies. [Abstract]

2025 Jan:182:117756. PMID: 39693907

Solvent & Solubility

In Vitro:

H₂O : 50 mg/mL (202.64 mM; Need ultrasonic)

DMSO : ≥ 25 mg/mL (101.32 mM; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

* "≥" means soluble, but saturation unknown.

View the Complete Stock Solution Preparation Table

Preparing Stock Solutions

View the Complete Stock Solution Preparation Table

Concentration Solvent Mass

1 mg

5 mg

10 mg

Concentration

Solvent

Mass

1 mM

4.0528 mL

20.2642 mL

40.5285 mL

5 mM

0.8106 mL

4.0528 mL

8.1057 mL

10 mM

0.4053 mL

2.0264 mL

4.0528 mL

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 (sealed storage, away from moisture). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.

Molarity Calculator

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

Mass Mass

Concentration Concentration

Volume Volume

Molecular Weight Molecular Weight

Dilution Calculator

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

Concentration _(start) Concentration _(start)

Volume _(start) Volume _(start)

Concentration _(final) Concentration _(final)

Volume _(final) Volume _(final)

In Vivo:

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

Stock Solution Working Solution

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 (10.13 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.

Protocol 2

Add each solvent one by one: 10% DMSO 90% (20% SBE-β-CD in Saline)

Solubility: ≥ 2.5 mg/mL (10.13 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.

Protocol 3

Add each solvent one by one: 10% DMSO 90% Corn Oil

Solubility: ≥ 2.5 mg/mL (10.13 mM); Suspended solution

This protocol yields a suspended solution of ≥ 2.5 mg/mL (saturation unknown). Suspended solution can be used for oral and intraperitoneal injection.

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.

Working Solution

For the following dissolution methods, please prepare the working solution directly:

It is recommended to prepare fresh solutions and use them promptly within a short period of time.

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: PBS

Solubility: 75 mg/mL (303.96 mM); Clear solution; Need ultrasonic

In Vivo Dissolution Calculator

Please enter the basic information of animal experiments:

Dosage Dosage
mg/kg
Animal Weight (Per Animal) Animal Weight (Per Animal)
g
Dosing Volume (Per Animal) Dosing Volume (Per Animal)
μL
Number of Animals Number of Animals

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

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

Working solution concentration: 0.22 mg/mL

This product has good water solubility, please refer to the measured solubility data in water/PBS/Saline for details.

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) .

Purity & Documentation

Select Batch:

Purity: 99.98%

Assay: 99.98%

ee.: 99.98%

Data Sheet (277 KB)
SDS (393 KB)
- English - EN (393 KB)
- Français - FR (393 KB)
- Deutsch - DE (393 KB)
- Norwegian - NO (393 KB)
- Español - ES (393 KB)
- Swedish - SV (393 KB)
- Italian - IT (393 KB)
- Korean - KR (393 KB)
- Portuguese - PT (393 KB)
COA (2659 KB)
Elemental Analysis Report (2659 KB)
HNMR (2659 KB)
CNMR (2659 KB)
RP-HPLC (2659 KB)
NP-HPLC (2659 KB)
MS (2659 KB)
LCMS (2659 KB)
IR (2659 KB)
GC (2659 KB)
OR (2659 KB)
SDS-PAGE (2659 KB)
SEC-HPLC (2659 KB)
Other Report (2659 KB)
Handling Instructions (2659 KB)

References

[1]. Quan L, et, al. Treatment with olopatadine and naphazoline hydrochloride reduces allergic conjunctivitis in mice through alterations in inflammation, NGF and VEGF. Mol Med Rep. 2016 Apr;13(4):3319-25. [Content Brief]

[2]. Yamaguchi I, et, al. Central and peripheral adrenergic mechanisms regulating gastric secretion in the rat. J Pharmacol Exp Ther. 1977 Oct;203(1):125-31. [Content Brief]

Help & FAQs

How should lyophilized recombinant proteins be reconstituted and stored?

1. Before opening the cap, centrifuge the vial at 13000 rpm for 20-30 seconds. This step will ensure that any lyophilized powder that may have adhered to the cap or walls is collected at the bottom of the vial, minimizing the risk of product loss.

Complete Stock Solution Preparation Table

Optional Solvent	Concentration Solvent Mass	1 mg	5 mg	10 mg	25 mg
DMSO / H₂O	1 mM	4.0528 mL	20.2642 mL	40.5285 mL	101.3212 mL
	5 mM	0.8106 mL	4.0528 mL	8.1057 mL	20.2642 mL
	10 mM	0.4053 mL	2.0264 mL	4.0528 mL	10.1321 mL
	15 mM	0.2702 mL	1.3509 mL	2.7019 mL	6.7547 mL
	20 mM	0.2026 mL	1.0132 mL	2.0264 mL	5.0661 mL
	25 mM	0.1621 mL	0.8106 mL	1.6211 mL	4.0528 mL
	30 mM	0.1351 mL	0.6755 mL	1.3509 mL	3.3774 mL
	40 mM	0.1013 mL	0.5066 mL	1.0132 mL	2.5330 mL
	50 mM	0.0811 mL	0.4053 mL	0.8106 mL	2.0264 mL
	60 mM	0.0675 mL	0.3377 mL	0.6755 mL	1.6887 mL
	80 mM	0.0507 mL	0.2533 mL	0.5066 mL	1.2665 mL
	100 mM	0.0405 mL	0.2026 mL	0.4053 mL	1.0132 mL

* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.

Keywords

Naphazoline hydrochloride

1 Cited Publications

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Naphazoline hydrochloride

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Publications Citing Use of MedChemExpress (MCE) Naphazoline hydrochloride

All Adrenergic Receptor Isoforms

All TNF Receptor Isoforms

All Interleukin Related Isoforms

All VEGFR Isoforms

Biological Activity

Chemical Information

Publications (1)

Solvent & Solubility

Purity & Documentation

References

Help & FAQs

Complete Stock Solution Preparation Table

Naphazoline hydrochloride Related Classifications

HY-B0446 Related Classifications