Ursodeoxycholic acid impurity 24 CAS 640-79-9
| CAS No. | 640-79-9 |
| Molecular Formula | C26H43NO5 |
| Molecular Weight | 449.62 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of Ursodeoxycholic acid impurity 24 (C26H43NO5) is characterized by a steroid core, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO supplies Ursodeoxycholic acid impurity 24 (CAS 640-79-9), a pharmacopoeial impurity reference standard (molecular formula C26H43NO5, MW 449.62 g/mol) used for the identification and quantification of trace impurities in APIs.
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 impurity 24 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 | C26H43NO5 |
| Molecular Weight | 449.62 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| Storage | Store at room temperature, 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 1 |
Related Ursodeoxycholic Standards
- Ursodeoxycholic Acid Impurity 121 (CAS CATO-C4X-1422121)
- Ursodeoxycholic Acid Impurity 2(Glycoursodeoxycholic Acid) (CAS 64480-66-6)
- Ursodeoxycholic acid impurity 56 (CAS 15073-99-1)
- Ursodeoxycholic Acid impurity 72 (CAS 2168516-46-7)
- Ursodeoxycholic Acid Impurity 115 (CAS 2446100-56-5)
- Ursodeoxycholic Acid Impurity 109 (CAS CATO-C4X-1422109)
- Ursodeoxycholic Acid impurity 90 (CAS CATO-C4X-142290)
- Ursodeoxycholic Acid Impurity 130 (CAS 63060-59-3)
Recommended Standards
- Medroxyprogesterone Impurity 14 (CAS CATO-C4X-145714)
- Glycohyodeoxycholic Acid (CAS 13042-33-6)
- Cholic Acid Impurity 22 (CAS 360-65-6)
- 7-Dehydroxy Buprenorphine (Buprenorphine Impurity F) (CAS 97203-04-8)
- Dexmedetomidine Impurity 12 (CAS 2240179-65-9)
- Mirabegron Impurity 130 (CAS CATO-C4X-1032130)
- Ubrogepant Impurity 30 (CAS CATO-C4X-340230)
- 7-bromo-6-fluoro-1H-indazole (CAS 1427377-75-0)
- 1,5-Dimethyl (2E)-3-oxo-2-{2-[2-(trifluoromethyl)phenyl]hydrazin-1-ylidene}pentanedioate (CAS 121582-46-5)
- Ethyl 2-methyl-3H-imidazo[4,5-b]pyridine-5-carboxylate (CAS 1260663-60-2)
- Fmoc-L-His-OH (CAS 116611-64-4)
- 4-(Azepan-1-yl)but-2-yn-1-amine dihydrochloride (CAS 1396770-32-3)
- Ethyl 1,5-dimethyl-1H-imidazole-4-carboxylate (CAS 74531-82-1)
- Semaglutide impurity 80 (CAS CATO-C4X-222680)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com