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Cetirizine methyl ester, an impurity of Cetirizine, serves as a specific, orally active, and long-acting histamine H1-receptor antagonist. As a second-generation antihistamine and the carboxylated metabolite of hydroxyzine, Cetirizine effectively counters allergic reactions [1].

| Pack Size | Price | Availability | Quantity |
|---|---|---|---|
| 5 mg | Inquiry | Backorder | |
| 50 mg | Inquiry | Backorder |
| Description | Cetirizine methyl ester, an impurity of Cetirizine, serves as a specific, orally active, and long-acting histamine H1-receptor antagonist. As a second-generation antihistamine and the carboxylated metabolite of hydroxyzine, Cetirizine effectively counters allergic reactions [1]. |
| Molecular Weight | 402.91 |
| Formula | C22H27ClN2O3 |
| Cas No. | 83881-46-3 |
| Storage | Powder: -20°C for 3 years | In solvent: -80°C for 1 year | Shipping with blue ice/Shipping at ambient temperature. |

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