Levocetirizine Impurity 79 CAS CATO-C4X-108379
| CAS No. | CATO-C4X-108379 |
| Molecular Formula | C33H45ClN2O13 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution, Levocetirizine Impurity 79 is typically pale yellow to yellow amorphous powder. Its solid-state physicochemical attributes — including a molecular weight of 749.63 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Levocetirizine Impurity 79 (CAS CATO-C4X-108379) is a certified pharmaceutical impurity reference standard with the molecular formula C33H45ClN2O13HCl and a molecular weight of 749.63 g/mol.
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C33H45ClN2O13 HCl |
| Molecular Weight | 749.63 g/mol |
| Purity | ≥95% |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Levocetirizine Standards
- Levocetirizine Impurity 50 (CAS 1074-42-6)
- Levocetirizine Impurity 5 (CAS 109036-15-9)
- Levocetirizine Impurity 43 (CAS 1116338-10-3)
- Levocetirizine Impurity 45 (CAS 1150310-68-1)
- Levocetirizine Dihydrochloride - Impurity H (Hydrochloride Salt) (CAS 1177093-13-8)
- Levocetirizine Impurity 24 (CAS 1232460-29-5)
- Levocetirizine Impurity 80 (CAS 1232460-31-9)
- Levocetirizine Impurity 17 (CAS 126517-38-2)
Recommended Standards
- Fenofibrate Impurity N2 (CAS 5129-36-2)
- Caspofungin Impurity C (CAS 251095-73-5)
- Felodipine EP Impurity B (CAS 91189-59-2)
- 4,4,5,5-Tetramethyl-2-(3,3a,4,6a-tetrahydro-1H-cyclopenta[c]thiophen-5-yl)-1,3,2-dioxaborolane (CAS 2417113-05-2)
- Methyl 6-amino-5-fluoronicotinate (CAS 1256792-42-3)
- Imidazo[2,1-b]thiazole-5,6-diamine (CAS 863203-49-0)
- 3-(2-Morpholin-4-yl-5-trifluoromethyl-pyridin-3-yl)-benzoic acid methyl ester (CAS 1311279-51-2)
- 2-(Isoquinolin-3-yl)acetonitrile (CAS 58130-44-2)
- Cycloheptyl(4-(trifluoromethyl)phenyl)methanone (CAS 1443312-55-7)
- Tirzepatide Impurity 22 X TFA Salt (CAS CATO-C4X-324022)
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