24-Nor Ursodeoxycholic Acid Methyl Ester CAS 118316-16-8
| CAS No. | 118316-16-8 |
| Molecular Formula | C24H40O4 |
| Molecular Weight | 392.57 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 24-Nor Ursodeoxycholic Acid Methyl Ester is closely related to a steroid core, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
24-Nor Ursodeoxycholic Acid Methyl Ester (CAS 118316-16-8) is a high-purity analytical reference standard with the molecular formula C24H40O4 and a molecular weight of 392.57 g/mol.
The molecular framework of 24-Nor Ursodeoxycholic Acid Methyl Ester (C24H40O4) is characterized by a steroid core, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 24-Nor Ursodeoxycholic Acid Methyl Ester 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 | C24H40O4 |
| Molecular Weight | 392.57 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| 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.) | 1990 |
Related Nor Standards
- 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)
- Ursodeoxycholic Acid EP Impurity E (CAS 83-44-3)
Recommended Standards
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- Dicyclohexyl(2',4',6'-trimethyl-[1,1'-biphenyl]-2-yl)phosphine (CAS 298205-50-2)
- (trans,trans)-4-(4-Ethoxy-2,3-difluorophenyl)-4'-pentyl-1,1'-bi(cyclohexane) (CAS 124728-81-0)
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