Ursodeoxycholic Acid EP Impurity C CAS 434-13-9
| CAS No. | 434-13-9 |
| Molecular Formula | C24H40O3 |
| Molecular Weight | 376.57 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Ursodeoxycholic Acid EP Impurity C.
As a process- or degradation-related impurity, Ursodeoxycholic Acid EP Impurity C (CAS 434-13-9, C24H40O3) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C24H40O3, Ursodeoxycholic Acid EP Impurity C contains a steroid core, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 376.57 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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.
As a certified reference material (CRM), Ursodeoxycholic Acid EP Impurity C 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 | C24H40O3 |
| Molecular Weight | 376.57 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| Storage | Store at room temperature, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related Ursodeoxycholic Standards
- Ursodeoxycholic Acid Impurity N3 (CAS 28083-34-3)
- Ursodeoxycholic Acid impurity 100 (CAS CATO-C4X-1422100)
- Ursodeoxycholic Acid Impurity 123 (CAS 10601-78-2)
- Ursodeoxycholic Acid Impurity 13 (CAS 5255-17-4)
- Ursodeoxycholic Acid impurity 106 (CAS CATO-C4X-1422106)
- Ursodeoxycholic Acid Impurity 68 (CAS 62797-60-8)
- Ursodeoxycholic Acid Impurity 21 (CAS 23848-46-6)
- Ursodeoxycholic Acid EP Impurity I (CAS 130593-75-8)
Recommended Standards
- Isoallolithocholic Acid (CAS 2276-93-9)
- (3β,5β)-3-Hydroxycholan-24-oic Acid (CAS 1534-35-6)
- Cholic Acid Impurity 24 (CAS 15173-22-5)
- 1-(4-Chloro-3-iodophenyl)ethyl 1H-pyrazole-4-carboxylate (CAS 110821-43-7)
- Empagliflozin Impurity 302 (CAS CATO-C4X-1065302)
- Trazodone impurity 54 (CAS 55290-67-0)
- Lomefloxacin Impurity 10 （HCl） (CAS CATO-C4X-207310)
- 3H,4H,7H-Imidazo[4,5-b]pyridine-7-thione (CAS 1421-25-6)
- 6,8-Dimethyl-2-(pyridin-4-yl)quinoline-4-carbonyl chloride (CAS 1203146-78-4)
- Dimethylone hydrochloride (CAS 109367-07-9)
- 1-(4-Methoxybenzyl)piperazine 1-[(4-methoxyphenyl)methyl]piperazine 1-(4-methoxy-benzyl)-piperazine 21867-69-6 (CAS 21867-69-6)
- 4-Bromo-2-nitro-1-(o-tolyloxy)benzene (CAS 1312141-29-9)
- 5-(1H-Benzo[d]imidazol-2-yl)pentan-1-amine (CAS 39650-63-0)
- Semaglutide Impurity 186 (CAS CATO-C4X-2226186)
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