Levocabastine impurity 21 CAS CATO-C4X-228921
| CAS No. | CATO-C4X-228921 |
| Molecular Formula | C20H23NO2 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Levocabastine impurity 21 (C20H23NO2HCl) contains a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 345.87 g/mol, it falls into the moderately-high-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
CATO supplies Levocabastine impurity 21 (CAS CATO-C4X-228921), a pharmacopoeial impurity reference standard (molecular formula C20H23NO2HCl, MW 345.87 g/mol) used for the identification and quantification of trace impurities in APIs.
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.
CATO manufactures Levocabastine impurity 21 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 | C20H23NO2 HCl |
| Molecular Weight | 345.87 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Levocabastine Standards
- Levocabastine EP impurity E (CAS 105452-51-5)
- Levocabastine Impurity 9 (CAS 179064-61-0)
- Levocabastine Impurity 4 (CAS 25115-74-6)
- Levocabastine EP Impurity H (CAS 56326-98-8)
- Levocabastine Impurity 11 (CAS 577036-07-8)
- Levocabastine EP Impurity F (CAS 785021-81-0)
- Levocabastine EP Impurity F (CAS 793621-70-2)
- Levocabastine (CAS 79516-68-0)
Recommended Standards
- Lefamulinum Impurity 29 (CAS CATO-C4X-304729)
- Gadobutrol Impurity 104 4HCl (CAS 112193-75-6（free base）)
- Nafamostat impurity 107 (CAS CATO-C4X-1332107)
- 2,3',4'-Trichloroacetophenone (CAS 42981-08-8)
- 1-(Pyridin-2-ylsulfonyl)piperazine hydrochloride (CAS 1353948-48-7)
- 7-chloro-1-(propan-2-yl)-1H-1,3-benzodiazole-2-carbaldehyde (CAS 1343917-44-1)
- benzo[e]benzofuran-2-carboxylic acid (CAS 5656-67-7)
- Methyl (2-(3-(trifluoromethyl)-1h-pyrazol-1-yl)acetyl)glycinate (CAS 1156076-80-0)
- (T-4)-Bis(8-quinolinolato-κN1,κO8)magnesium (CAS 67952-28-7)
- Semaglutide Impurity 12 (CAS CATO-C4X-222612)
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