Cetirizine Impurity 34 (Mixture of Diastereomers) CAS 1243652-36-9
| CAS No. | 1243652-36-9 |
| Molecular Formula | C24H31ClN2O5 |
| Molecular Weight | 462.97 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of Cetirizine Impurity 34 (Mixture of Diastereomers) (C24H31ClN2O5) is characterized by a flavonoid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Cetirizine Impurity 34 (Mixture of Diastereomers) (CAS 1243652-36-9) is a certified pharmaceutical impurity reference standard with the molecular formula C24H31ClN2O5 and a molecular weight of 462.97 g/mol.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
CATO manufactures Cetirizine Impurity 34 (Mixture of Diastereomers) under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C24H31ClN2O5 |
| Molecular Weight | 462.97 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | >90% |
| 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Cetirizine Standards
- Cetirizine Impurity 18 (CAS CATO-C4X-158218)
- Cetirizine Impurity 39 (CAS CATO-C4X-108339)
- (S)-Cetirizine Propanediol Ester (CAS CATO-C4X-158212)
- Cetirizine Impurity 16 (CAS CATO-C4X-158216)
- Cetirizine impurity 31 (CAS CATO-C4X-158231)
- Cetirizine Impurity 17 (CAS CATO-C4X-158217)
- Cetirizine EP Impurity D (CAS 346451-15-8)
- Cetirizine Impurity 25 (CAS CATO-C4X-158225)
Recommended Standards
- 4-({[4-(4-chlorophenyl)-3-cyano-6-(thiophen-2-yl)pyridin-2-yl]sulfanyl}methyl)benzoic acid (CAS 340808-65-3)
- Levocetirizine Impurity 64 (CAS CATO-C4X-108364)
- (S)-N-(1-(4-(5-Chloro-2-oxo-2,3-dihydro-1H-benzo[d]imidazol-1-yl)piperidin-1-yl)propan-2-yl)-2-naphthamide (CAS 1130067-06-9)
- CP 465022 (CAS 199655-36-2)
- Lidocaine Impurity 99 (CAS CATO-C4X-167999)
- Polaprezinc Impurity 14 DiHCl (CAS CATO-C4X-182114)
- Dotinurad Impurity 63 (CAS CATO-C4X-249463)
- 1-(2-((2-Aminoethoxy)methyl)pyrrolidin-1-yl)ethanone (CAS 1353946-64-1)
- 2-(3-Methoxy-4-nitro-1h-pyrazol-1-yl)ethan-1-amine hydrochloride (CAS 1417569-74-4)
- tert-Butyl (2-hydroxypent-4-en-1-yl)carbamate (CAS 113525-94-3)
- 2-(Isoquinolin-7-yl)ethanamine (CAS 1158755-12-4)
- 17b-Hydroxy-5b-estran-3-one (CAS 19468-31-6)
- 6-Cyclopropyl-3-methyl-1-phenyl-1h-pyrazolo[3,4-b]pyridine-4-carbohydrazide (CAS 886495-92-7)
- Semaglutide Impurity 10 (CAS CATO-C4X-222610)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com