Carteolol Impurity 21 CAS CATO-C4X-228721
| CAS No. | CATO-C4X-228721 |
| Molecular Formula | C9H13NO3 |
| Molecular Weight | 183.20 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Carteolol Impurity 21 is closely related to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Carteolol Impurity 21 (CAS CATO-C4X-228721) is a certified pharmaceutical impurity reference standard with the molecular formula C9H13NO3 and a molecular weight of 183.20 g/mol.
The molecular framework of Carteolol Impurity 21 (C9H13NO3) is characterized by an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. 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).
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.
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 | C9H13NO3 |
| Molecular Weight | 183.20 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Carteolol Standards
- Carteolol Impurity 24 (CAS CATO-C4X-228724)
- Carteolol Impurity 33 (CAS 34685-03-5)
- Carteolol EP Impurity A (CAS 5057-12-5)
- Carteolol Impurity 30 (CAS CATO-C4X-228730)
- Carteolol Hydrochloride EP Impurity B (CAS 30389-33-4)
- Carteolol Impurity 29 (CAS 23674-56-8)
- Carteolol EP Impurity C (CAS 51781-14-7)
- Carteolol Impurity 31 (CAS CATO-C4X-228731)
Recommended Standards
- Metaraminol Impurity 5 (CAS 20727-99-5)
- Phloroglucinol Impurity 30 (CAS 14227-17-9)
- 4-Methyl-5-morpholinofuran-2(5H)-one (CAS 78920-07-7)
- Nadifloxacin Impurity 2 (CAS 80076-46-6)
- Deoxycholic acid Impurity 7 (CAS 13002-75-0)
- Voglibose Impurity 11 (CAS CATO-C4X-178011)
- Azilsartan Impurity 118 (CAS CATO-C4X-1096118)
- Ethyl 4-(4-(tert-butyl)phenyl)-4-oxobutanoate (CAS 75237-09-1)
- 4-Hydroxy-3-quinolinemethanol (CAS 82121-18-4)
- 3-cyclobutyl-4-methyl-4H-1,2,4-triazole (CAS 1443980-03-7)
- 3-Ethenyl-4-methylpyridine (CAS 45658-39-7)
- (S)-1-(2,6-Dimethylphenoxy)propan-2-amine hydrochloride (CAS 81771-85-9)
- (5-Cyclopropoxy-4-methylpyridin-3-yl)methanamine (CAS 1243383-39-2)
- Palmitoyl Tripeptide-5 TFA (CAS 623172-55-4（free base）)
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