Ursodeoxycholic Acid EP Impurity E CAS 83-44-3
| CAS No. | 83-44-3 |
| Molecular Formula | C24H40O4 |
| Molecular Weight | 392.57 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Ursodeoxycholic Acid EP Impurity E 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.
As a process- or degradation-related impurity, Ursodeoxycholic Acid EP Impurity E (CAS 83-44-3, C24H40O4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Owing to a steroid core, a hydroxyl group, an ether linkage, Ursodeoxycholic Acid EP Impurity E is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 392.57 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).
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.
Physical & Chemical Properties
| Molecular Formula | C24H40O4 |
| Molecular Weight | 392.57 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
- 24-Nor Ursodeoxycholic Acid Methyl Ester (CAS 118316-16-8)
- Ursodeoxycholic Acid impurity 102 (CAS CATO-C4X-1422102)
- Ursodeoxycholic Acid Impurity 110 (CAS CATO-C4X-1422110)
- Ursodeoxycholic Acid Impurity 114 (CAS 51446-79-8)
- Ursodeoxycholic Acid Impurity 22 (CAS 566-24-5)
- Ursodeoxycholic acid Impurity 23 (CAS CATO-C4X-142223)
- Ursodeoxycholic Acid EP Impurity A (CAS 474-25-9)
- Ursodeoxycholic acid impurity 31 (CAS 566-17-6)
Recommended Standards
- Cholic Acid Impurity 58 (CAS 105227-28-9)
- Ursodeoxycholic Acid EP Impurity H (CAS 78919-26-3)
- Allochenodeoxycholic acid (CAS 15357-34-3)
- (3α,5α,12α)-3,12-Dihydroxycholan-24-oic acid (CAS 1912-55-6)
- Pregabalin Impurity 126 (CAS 2514962-85-5)
- Erlotinib Impurity 86 (CAS CATO-C4X-106986)
- Icotrokinra Impurity 2 (CAS CATO-C4X-35202)
- 3-(2-Chloro-6-fluorophenyl)propanenitrile (CAS 1057676-61-5)
- 5-(2-Chlorophenyl)-N-(2,4-difluorophenyl)furan-2-carboxamide (CAS 853331-40-5)
- 2,7-Dibromo-9-heptyl-9H-carbazole (CAS 1173071-58-3)
- 1-[1-[(4-Methylphenyl)sulfonyl]-1H-pyrrol-2-yl]ethanone (CAS 129666-99-5)
- 3-(Boc-amino)-L-alanine (CAS 74536-29-1)
- 4-Chloro-N-(cyclopropylmethyl)aniline hydrochloride (CAS 1785761-10-5)
- Autocamtide-2-Related Inhibitory Peptide TFA (CAS 167114-91-2（free base）)
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