Atrasentan Impurity 4 CAS CATO-C4X-33474
| CAS No. | CATO-C4X-33474 |
| Molecular Formula | C19H19NO5 |
| Molecular Weight | 341.36 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 Atrasentan Impurity 4.
CATO supplies Atrasentan Impurity 4 (CAS CATO-C4X-33474), a pharmacopoeial impurity reference standard (molecular formula C19H19NO5, MW 341.36 g/mol) used for the identification and quantification of trace impurities in APIs.
Atrasentan Impurity 4 (C19H19NO5) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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), Atrasentan Impurity 4 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 | C19H19NO5 |
| Molecular Weight | 341.36 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Atrasentan Standards
- Atrasentan Impurity 210 (CAS CATO-C4X-3347210)
- Atrasentan Impurity 186 (CAS CATO-C4X-3347186)
- Atrasentan Impurity 187(2S,3S,4S) (CAS CATO-C4X-3347187)
- Atrasentan Impurity 188 (CAS CATO-C4X-3347188)
- Atrasentan Impurity 189 (CAS CATO-C4X-3347189)
- Atrasentan Impurity 190 (CAS CATO-C4X-3347190)
- Atrasentan Impurity 191 (CAS CATO-C4X-3347191)
- Atrasentan Impurity 203 (CAS CATO-C4X-3347203)
Recommended Standards
- Belumosudil Impurity 38 (CAS CATO-C4X-298838)
- Monocrotaline N-Oxide (CAS 35337-98-5)
- Tranilast impurity 5 (CAS 697235-52-2)
- L-655708 (CAS 130477-52-0)
- Irbesartan impurity 40 (CAS CATO-C4X-166640)
- Levofloxacin Impurity 17 (CAS CATO-C4X-137117)
- Zolmitriptan EP Impurity F (CAS 139264-69-0)
- Tert-butyl (R)-(2-fluoro-3-iodopropyl)carbamate (CAS 344413-81-6)
- 2-(4-((4-Fluorophenoxy)methyl)-1H-1,2,3-triazol-1-yl)acetic acid (CAS 1355216-59-9)
- 1-(5-Ethyl-1h-1,2,4-triazol-3-yl)-2-methylpropan-1-amine (CAS 1249388-10-0)
- 2,7-Dichloroquinoline (CAS 613-77-4)
- (2S)-n-ethylpyrrolidine-2-carboxamide (CAS 55446-83-8)
- 7-chloro-1,3-dihydropyrrolo[3,2-b]pyridin-2-one (CAS 1190318-32-1)
- Protein Kinase C (alpha) Peptide (CAS 159939-84-1)
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