S-Levocetirizine CAS 163837-48-7
| CAS No. | 163837-48-7 |
| Molecular Formula | C21H25ClN2O3 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C21H25ClN2O3HCl, S-Levocetirizine contains a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 425.35 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
S-Levocetirizine (CAS 163837-48-7), molecular formula C21H25ClN2O3HCl and molecular weight 425.35 g/mol, is a CATO reference standard with documented purity and traceability.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), S-Levocetirizine meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C21H25ClN2O3 2*HCl |
| Molecular Weight | 425.35 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2003 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related S 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
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- 2-(4-Methylpiperazinomethyl)benzophenone (CAS 24088-65-1)
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- 2-Methyl-1H-indene-1,3(2H)-dione (CAS 876-83-5)
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- 1-benzyl-N-(4-methanesulfonylphenyl)-1H-pyrazole-4-carboxamide (CAS 1354961-60-6)
- Steroidogenesis-Activator Polypeptide (rat) (H-8855.0500) (CAS 108563-23-1)
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