Esmolol Impurity 43 CAS CATO-C4X-189143
| CAS No. | CATO-C4X-189143 |
| Molecular Formula | C19H16O5 |
| Molecular Weight | 324.33 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.
As a process- or degradation-related impurity, Esmolol Impurity 43 (CAS CATO-C4X-189143, C19H16O5) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Owing to a flavonoid core, a hydroxyl group, an ether linkage, Esmolol Impurity 43 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 324.33 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
As a certified reference material (CRM), Esmolol Impurity 43 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C19H16O5 |
| Molecular Weight | 324.33 g/mol |
| Appearance | Pale yellow to 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Esmolol Standards
- Esmolol Impurity 68 (CAS CATO-C4X-189168)
- Esmolol Impurity 92 (CAS CATO-C4X-189192)
- Esmolol Impurity 83 (CAS CATO-C4X-189183)
- Esmolol Impurity 5 (CAS 83356-59-6)
- Esmolol Impurity 44 (CAS CATO-C4X-189144)
- Esmolol Impurity 42 (CAS CATO-C4X-189142)
- Esmolol Impurity 36 (CAS CATO-C4X-189136)
- Esmolol Impurity 72 (CAS 1293388-71-2)
Recommended Standards
- Warfarin impurity 16 (CAS CATO-C4X-17816)
- Methyl 2-O-acetyl-4,6-O-benzylidene-α-D-glucopyranoside (CAS 25577-40-6)
- Mycophenolate Impurity 24 (CAS CATO-C4X-151524)
- Tegoprazan Impurity 78 (CAS CATO-C4X-229778)
- Edoxaban Impurity 26 (CAS 1255529-27-1)
- Tivozanib Impurity 4 (CAS CATO-C4X-34004)
- Afoxolaner Impurity 14 (CAS 1125726-30-8)
- Perampanel Impurity 57 (CAS CATO-C4X-243057)
- 3-iodo-5-methoxy-4H-chromen-4-one (CAS 904318-61-2)
- 2-(Cyclopentyloxy)nicotinaldehyde (CAS 902837-49-4)
- N-(5-(3-Ethylhexan-3-yl)-1,3,4-thiadiazol-2-yl)-2,6-dimethoxybenzamide (CAS 82559-33-9)
- 1-cyclobutoxy-4-ethynylbenzene (CAS 1850942-27-6)
- Perindopril Impurity 80 HCl (CAS CATO-C4X-125280)
- Peptide Impurity 40 (CAS CATO-CPTD788840)
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