ANTAZOLINE
Antazoline is a first‑generation antihistamine used for allergic conjunctivitis. It blocks H1 receptors, providing itch and redness relief. Side effects may include mild stinging, dryness, or blurred vision.
About MedicaPharma
MedicaPharma distributes high-quality active pharmaceutical ingredients (APIs) to hospitals, commercial (compounding) pharmacies, research institutes, and universities worldwide.
Network of over +400 GMP API producers
Let us handle your sourcing / supply activities. Highly experienced in sourcing specialty raw pharmaceutical ingredients from niche GMP manufacturers around the world.
Why Choose MedicaPharma
Niche API specialist - Pro-active supply partner - High service level - Global network - Logistics according to GDP regulations
Product Description
Mechanism of action
Antazoline is an H₁ antihistamine with additional anticholinergic properties. It competitively blocks peripheral histamine H₁ receptors, reducing vasodilation, vascular permeability, and allergic inflammatory responses.
Benefits and advantages
Widely used in allergy pathway research, mast‑cell mediator studies, ocular pharmacology, and comparative antihistamine evaluations. Its rapid onset makes it a reference compound in acute allergic reaction testing.
Side effects and risks
Sedation, anticholinergic effects, mild tachycardia, and rare hypersensitivity may occur. Handle as a CNS‑active antihistamine.
Datasheet
| Molecular Formula | C17H19N3O |
|---|---|
| Molecular Weight | 265.35 g/mol |
| CAS Number | 91-75-8 |
| Storage Condition | Store in a cool, dry place. Keep container tightly closed. Protect from moisture and light. |
| Solubility | Solubility depends on solvent and conditions (e.g., pH). Please contact us for solvent-specific guidance. |
| Purity | Purity information is available upon request (COA). |
| Synonym | antazoline; 91-75-8; Phenazoline; Antihistal; Antastan |
| IUPAC/Chemical Name | N-benzyl-N-(4,5-dihydro-1H-imidazol-2-ylmethyl)aniline |
| InChl Key | REYFJDPCWQRWAA-UHFFFAOYSA-N |
| InChl Code | InChI=1S/C17H19N3/c1-3-7-15(8-4-1)13-20(14-17-18-11-12-19-17)16-9-5-2-6-10-16/h1-10H,11-14H2,(H,18,19) |
| References |
3D Conformer.
(Click, turn or enlarge)
Download our GMP API Product List.
MedicaPharma is an EU-based supplier of GMP-certified APIs that serves leading healthcare institutions and research organizations.
Click here to download our full API product list.


