Cholic Acid Impurity 19 CAS 2304-89-4
| CAS No. | 2304-89-4 |
| Molecular Formula | C24H38O5 |
| Molecular Weight | 406.56 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C24H38O5, Cholic Acid Impurity 19 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 406.56 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
CATO supplies Cholic Acid Impurity 19 (CAS 2304-89-4), a pharmacopoeial impurity reference standard (molecular formula C24H38O5, MW 406.56 g/mol) used for the identification and quantification of trace impurities in APIs.
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), Cholic Acid Impurity 19 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 | C24H38O5 |
| Molecular Weight | 406.56 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 |
Related Cholic Standards
- Cholic Acid Impurity 78 (CAS 79732-73-3)
- Cholic Acid Impurity 79 (CAS 111137-23-6)
- Cholic Acid Impurity 22 (CAS 14772-97-5)
- Cholic Acid Impurity 61 (CAS 28050-36-4)
- Cholic Acid Impurity 27 (CAS CATO-C4X-116027)
- Cholic Acid Impurity 28 (CAS CATO-C4X-116028)
- Cholic Acid Impurity 52 (CAS 68170-81-0)
- Cholic Acid impurity 75 (CAS 2862-62-6)
Recommended Standards
- Chenodeoxycholic Acid EP Impurity H (CAS 2458-08-4)
- (2S)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-3-phenyl-propanoic acid (2S)-2-[[9H-fluoren-9-ylmethoxy(oxo)methyl]amino]-3-phenylpropanoic acid 286460-71-7 A819517 (CAS 286460-71-7)
- (2R)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-3-(4-pyridyl)propanoic acid (2R)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-3-(4-pyridyl)propionic acid (2R)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-3-pyridin-4-yl-propanoic acid (2R)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-3-pyridin-4-ylpropanoic acid (2R)-2-[[9H-fluoren-9-ylmethoxy(oxo)methyl]amino]-3-pyridin-4-ylpropanoic acid 205528-30-9 Fmoc-D-4-Pyridylalanine (CAS 205528-30-9)
- Acetaminophen Impurity 45 (CAS 61578-86-7)
- Ciprofloxacin impurity 43 (CAS 105093-21-8)
- Iopamidol Impurity 53 (CAS CATO-C4X-145053)
- Lidocaine Hydrochloride EP Impurity K (CAS 50295-20-0)
- (S)-1-(tetrahydro-2H-pyran-4-yl)ethyl methanesulfonate (CAS 1932098-49-1)
- 1-(4-(Piperidin-4-ylamino)piperidin-1-yl)ethan-1-one (CAS 1182959-17-6)
- ((3-Acetylphenyl)sulfonyl)glycine (CAS 790270-98-3)
- Pyridinium tetrafluoroborate (CAS 505-07-7)
- 4-(Dimethylamino)-4-(pyridin-2-yl)cyclohexan-1-one (CAS 475211-78-0)
- 16-(3-(4-Chloro-3-(trifluoromethyl)phenyl)ureido)hexadecanoic acid (CAS 1611446-66-2)
- Tirzepatide Impurity 19 X TFA Salt (CAS CATO-C4X-324019)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com