Peptide Impurity 41 CAS CATO-CPTD788841
| CAS No. | CATO-CPTD788841 |
| Molecular Formula | C20H40N6O4 |
| Molecular Weight | 428.57 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Peptide Impurity 41 (CAS CATO-CPTD788841) is a certified pharmaceutical impurity reference standard with the molecular formula C20H40N6O4 and a molecular weight of 428.57 g/mol.
The molecular framework of Peptide Impurity 41 (C20H40N6O4) 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. 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).
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.
Physical & Chemical Properties
| Molecular Formula | C20H40N6O4 |
| Molecular Weight | 428.57 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 6 |
Related Peptide Standards
- Peptide Impurity 24 (CAS CATO-CPTD788824)
- Peptide Impurity 06 (CAS CATO-CPTD788806)
- Peptide Impurity 05 (CAS 2322924-83-2)
- Peptide Impurity 04 (CAS 2913424-91-4)
- Peptide 6A (H-6905.0005) (CAS 73549-32-3)
- Peptide Fmoc-Thi-Thi-OH (CAS CATO-CPTD788552)
- Peptide Impurity 40 (CAS CATO-CPTD788840)
- Peptide Impurity 34 (CAS 21282-09-7)
Recommended Standards
- Biotin EP Impurity A (CAS 1163708-46-0)
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- Cyclohexyl 3-((4-(tert-butyl)phenyl)sulfonyl)-3-phenylpropanoate (CAS 2376300-45-5)
- Indapamide EP Impurity B (CAS 63968-75-2)
- Zonisamide Impurity 5 (CAS 4865-84-3)
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