Esmolol Impurity 33 CAS 27542-85-4
| CAS No. | 27542-85-4 |
| Molecular Formula | C11H10O4 |
| Molecular Weight | 206.19 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Esmolol Impurity 33 (CAS 27542-85-4) is a certified pharmaceutical impurity reference standard with the molecular formula C11H10O4 and a molecular weight of 206.19 g/mol.
The molecular framework of Esmolol Impurity 33 (C11H10O4) is characterized by a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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 manufactures Esmolol Impurity 33 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 | C11H10O4 |
| Molecular Weight | 206.19 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1964 |
Related Esmolol Standards
- Esmolol Impurity 60 (CAS CATO-C4X-189160)
- Esmolol Impurity 34 (CAS 7249-16-3)
- Esmolol Impurity 53 (CAS 5535-03-5)
- Esmolol Impurity 86 (CAS CATO-C4X-189186)
- Esmolol Impurity 75 (CAS CATO-C4X-189175)
- Esmolol Impurity 38 (CAS 55226-78-3)
- Esmolol Impurity 20 (CAS 2167848-51-1)
- Esmolol Impurity 39 (CAS 54965-55-8)
Recommended Standards
- Dexlansoprazole Impurity 50 (CAS 87-91-2)
- Etoposide Impurity 26 (CAS 2089582-90-9)
- Donepezil Impurity 16 (CAS 36517-91-6)
- Coumarin Impurity 4 (CAS 2445-80-9)
- Solifenacin Impurity 19 (CAS 1029430-94-1)
- Rivaroxaban Impurity 117 (CAS CATO-C4X-1090117)
- Rasagiline Impurity 20 (CAS 1276516-71-2)
- Difenidol Impurity 1 (CAS 40220-79-9)
- 3-Methyl-N-(2-(pyridin-3-yl)pyrimidin-4-yl)benzamide (CAS 478046-52-5)
- 2-Thiopheneboronic Acid Pinacol Ester (CAS 193978-23-3)
- (S)-Benzyl cyclopropyl((1-(2-hydroxyethyl)pyrrolidin-2-yl)methyl)carbamate (CAS 1354016-26-4)
- 2-Hydroxy-2-(perfluorophenyl)acetic acid (CAS 652-24-4)
- 1-(Benzofuro[3,2-d]pyrimidin-4-yl)-N-(4-ethoxyphenyl)piperidine-3-carboxamide (CAS 1112392-96-7)
- Tirzepatide Impurity 34 (CAS CATO-C4X-324034)
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