Ursodeoxycholic Acid impurity 75 CAS 1516887-32-3
| CAS No. | 1516887-32-3 |
| Molecular Formula | C27H42O4 |
| Molecular Weight | 430.62 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 impurity 75.
Ursodeoxycholic Acid impurity 75 (CAS 1516887-32-3) is a certified pharmaceutical impurity reference standard with the molecular formula C27H42O4 and a molecular weight of 430.62 g/mol.
Ursodeoxycholic Acid impurity 75 (C27H42O4) contains a steroid core, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
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 certified reference material (CRM), Ursodeoxycholic Acid impurity 75 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 | C27H42O4 |
| Molecular Weight | 430.62 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1992 |
Related Ursodeoxycholic Standards
- Ursodeoxycholic Acid Impurity 130 (CAS 63060-59-3)
- Ursodeoxycholic Acid Impurity 109 (CAS CATO-C4X-1422109)
- Ursodeoxycholic Acid impurity 90 (CAS CATO-C4X-142290)
- Ursodeoxycholic Acid impurity 72 (CAS 2168516-46-7)
- Ursodeoxycholic acid impurity 56 (CAS 15073-99-1)
- Ursodeoxycholic Acid Impurity 118 (CAS 83896-19-9)
- Ursodeoxycholic Acid Impurity 117 (CAS 69700-82-9)
- Ursodeoxycholic Acid Impurity 71 (CAS 69519-35-3)
Recommended Standards
- Obeticholic Acid impurity 38 (CAS CATO-C4X-115338)
- Deoxycholic acid Impurity 10 (CAS 881023-82-1)
- Obeticholic Acid Impurity 27 (CAS 863239-59-2)
- Deoxycholic acid Impurity 27 (CAS 2242-12-8)
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- Dexamethasone Impurity 33 (CAS 75262-69-0)
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