Esmolol Impurity 4 CAS 81148-15-4
| CAS No. | 81148-15-4 |
| Molecular Formula | C15H23NO4 |
| Molecular Weight | 281.35 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C15H23NO4, Esmolol Impurity 4 contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 281.35 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.
Esmolol Impurity 4 (CAS 81148-15-4) is a certified pharmaceutical impurity reference standard with the molecular formula C15H23NO4 and a molecular weight of 281.35 g/mol.
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 Esmolol Impurity 4 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 | C15H23NO4 |
| Molecular Weight | 281.35 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, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1980 |
| Nitrogen Atoms | 1 |
Related Esmolol Standards
- (R)-Esmolol Acid (CAS 910651-37-5)
- Esmolol Impurity 29 (CAS CATO-C4X-189129)
- Esmolol Impurity 81 (CAS CATO-C4X-189181)
- Esmolol Impurity 37 (CAS CATO-C4X-189137)
- Esmolol Impurity 46 (CAS 112805-66-0)
- Esmolol Impurity 94 (CAS CATO-C4X-189194)
- Esmolol (S)-Isomer (Base) (CAS 115729-56-1)
- Esmolol (R)-Isomer (Base) (CAS 117405-53-5)
Recommended Standards
- Varenicline Impurity 40 (CAS CATO-C4X-196240)
- Thiamine /Vitamin B1 Impurity 53 (CAS CATO-C4X-187353)
- Metaraminol Impurity 108 (CAS CATO-C4X-2252108)
- Indobufen Impurity 6 (CAS 3087670-52-5)
- Baricitinib Impurity 134 (CAS CATO-C4X-2260134)
- Beclomethasone dipropionate Impurity 41 (CAS CATO-C4X-147441)
- Lurbinectedin Impurity 18 (CAS 2728715-09-9)
- 3-[4-oxo-4-(thiophen-2-yl)butanamido]propanoic acid (CAS 874623-31-1)
- Piperidine-4-carboximidamide dihydrochloride (CAS 1170937-23-1)
- 3-Bromo-5-(3-chlorophenyl)-1,2,4-oxadiazole (CAS 870974-72-4)
- 2-Bromo-1-(2-(dimethylamino)-1H-imidazol-4-yl)ethanone (CAS 88723-62-0)
- 2-(Tert-butyl) 3-methyl (3S,7S,8aR)-7-hydroxyhexahydropyrrolo[1,2-a]pyrazine-2,3(1H)-dicarboxylate (CAS 1266232-68-1)
- 5-(fluoromethoxy)pyrazine-2-carboxylic acid (CAS 1174321-00-6)
- Fibrinogen-Binding Peptide (CAS 137235-80-4)
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