Clemastine Impurity 11 Fumarate CAS CATO-C4X-183711
| CAS No. | CATO-C4X-183711 |
| Molecular Formula | C21H26ClNO |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Clemastine Impurity 11 Fumarate (CAS CATO-C4X-183711) is a certified pharmaceutical impurity reference standard with the molecular formula C21H26ClNOC4H4O4 and a molecular weight of 459.97 g/mol.
Based on its molecular formula C21H26ClNOC4H4O4, Clemastine Impurity 11 Fumarate contains a flavonoid 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 459.97 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO manufactures Clemastine Impurity 11 Fumarate 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 | C21H26ClNO C4H4O4 |
| Molecular Weight | 459.97 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Clemastine Standards
- Clemastine Impurity 27 (CAS 10095-17-7)
- Clemastine EP Impurity A(Mixture of Diastereomers) (CAS 108825-05-4)
- Clemastine Impurity 28 (CAS 1333340-87-6)
- Clemastine EP Impurity B (CAS 1352549-49-5)
- Clemastine fumarate (CAS 14976-57-9)
- Clemastine (CAS 15686-51-8)
- Clemastine Impurity 26 (CAS 171296-35-8)
- Clemastine Impurity 4 (CAS 20763-27-3)
Recommended Standards
- Ranitidine Impurity 13 (CAS 112233-24-6)
- Canagliflozin Impurity 28 (CAS CATO-C4X-112328)
- Fexofenadine Impurity 24 (CAS 908595-88-0)
- [3-(Propan-2-yl)phenyl]thiourea (CAS 930396-11-5)
- cis-1,2,3,6-Tetrahydrophthalimide-3-hydroxy (CAS 161961-43-9)
- 5-(Trifluoromethyl)spiro[indoline-2,4'-piperidin]-3-one (CAS 2752430-60-5)
- 2-(Oxazol-5-yl)pyrimidine-5-carbonitrile (CAS 1447607-64-8)
- 3-Hydroxy-3-phenyl-3,4-dihydro-1H-pyrido[2,1-c][1,4]oxazin-5-ium bromide (CAS 902172-67-2)
- 2-(3-Phenylpyrrolidin-1-yl)ethan-1-amine (CAS 33304-29-9)
- Semaglutide impurity 244(Fmoc-His(Fmoc)-Aib-OH) (CAS CATO-C4X-2226244)
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