Atrasentan Impurity 44 CAS 223139-41-1
| CAS No. | 223139-41-1 |
| Molecular Formula | C31H42N2O6 |
| Molecular Weight | 538.67 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Atrasentan Impurity 44 (CAS 223139-41-1) is a certified pharmaceutical impurity reference standard with the molecular formula C31H42N2O6 and a molecular weight of 538.67 g/mol.
Structurally, Atrasentan Impurity 44 (C31H42N2O6) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 12.0, corresponding to approximately 12 ring(s) or double-bond equivalent(s). With a molecular weight of 538.67 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
As a certified reference material (CRM), Atrasentan Impurity 44 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 | C31H42N2O6 |
| Molecular Weight | 538.67 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 95% |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2020 |
| Nitrogen Atoms | 2 |
Related Atrasentan Standards
- Atrasentan Impurity 192 (CAS CATO-C4X-3347192)
- Atrasentan Impurity 193 (CAS CATO-C4X-3347193)
- Atrasentan Impurity 194 (CAS CATO-C4X-3347194)
- Atrasentan Impurity 195 (CAS CATO-C4X-3347195)
- Atrasentan Impurity 196 (CAS CATO-C4X-3347196)
- Atrasentan Impurity 118 (CAS 1059759-94-2)
- Atrasentan Impurity 119 (CAS 209214-33-5)
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Recommended Standards
- Des-3-pyridylmethyl Indinavir (CAS 150323-38-9)
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- N-[5-[1-Hydroxy-2-[[2-(4-methoxy-3-methylphenyl)-1-methylethyl](phenylmethyl)amino]ethyl]-2-(phenylmethoxy)phenyl]-formamide (CAS 1616967-25-9)
- (Ra,S,S)-Bn-Spir oBOX (CAS 890090-22-9)
- Metoprolol EP Impurity O (CAS 154784-36-8)
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- Etrasimod Impurity 12 (CAS CATO-C4X-321412)
- [4-(3,5-dichlorophenoxy)phenyl]methanamine hydrochloride (CAS 1803582-98-0)
- 6-Amino-4-(chloromethyl)pyridin-2-ol (CAS 1393585-63-1)
- 4-(4-Chlorophenyl)but-3-yn-2-ol (CAS 153395-93-8)
- Methyl 2-Amino-2-(3,4-dimethoxyphenyl)acetate Hydrochloride (CAS 390815-42-6)
- 3,3-Dimethyl-1-(propylthio)cyclobutane-1-carboxylic acid (CAS 1468815-74-8)
- 2-(Ethoxymethyl)-3,8-dihydroxy-1-methoxyanthracene-9,10-dione (CAS 94035-92-4)
- [2-31]-Semaglutide C (x TFA Salt) (CAS CATO-C4X-2226118)
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