Enalapril Maleate Impurity 28 CAS CATO-C4X-133428
| CAS No. | CATO-C4X-133428 |
| Molecular Formula | C13H17NO4 |
| Molecular Weight | 251.28 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Enalapril Maleate Impurity 28 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.
Enalapril Maleate Impurity 28 (CAS CATO-C4X-133428) is a certified pharmaceutical impurity reference standard with the molecular formula C13H17NO4 and a molecular weight of 251.28 g/mol.
Structurally, Enalapril Maleate Impurity 28 (C13H17NO4) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 251.28 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C13H17NO4 |
| Molecular Weight | 251.28 g/mol |
| Appearance | Off-white to pale 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; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Enalapril Standards
- Enalapril Impurity 14 (Bis(2-chloroethyl)-Butanedioate) (CAS 925-17-7)
- Enalapril EP Impurity B (CAS 82717-96-2)
- Enalapril EP Impurity G (CAS 460720-14-3)
- Enalapril Impurity 10 (CAS 32315-10-9)
- Enalapril Impurity N1 (CAS 17450-56-5)
- Enalapril Impurity 19 (CAS 15121-89-8)
- Enalapril Impurity 7 (CAS CATO-C4X-13347)
- Enalapril Impurity 13 (CAS 84793-24-8)
Recommended Standards
- Nitroso Perindopril EP impurity K (CAS CATO-C4X-125249)
- Enalaprilat EP Impurity A (S,S-Isomer) (CAS 84023-58-5)
- Valaciclovir Impurity 35 (CAS 21691-44-1)
- Metoclopramide Impurity 84 (CAS 2486-67-1)
- Tofacitinib Impurity 233 (CAS CATO-C4X-1079233)
- Rivaroxaban Impurity 99 (CAS CATO-C4X-109099)
- Bortezomib Impurity 47（1S,2R） (CAS CATO-C4X-107247)
- (4-((1H-Imidazol-1-yl)methyl)phenyl)(3-((3-(2-fluorophenyl)-1,2,4-oxadiazol-5-yl)methyl)piperidin-1-yl)methanone (CAS 1706105-05-6)
- 1365963-34-3 2-Bromo-N,N-diphenylbutanamide MFCD22056602 (CAS 1365963-34-3)
- Etrasimod Impurity 52 (CAS CATO-C4X-321452)
- 4-Amino-N-((1-ethylpyrrolidin-2-yl)methyl)-2-methoxy-5-sulfamoylbenzamide (CAS 93838-91-6)
- Benzyl 3-amino-4-cyano-6,7-dihydro-5H-pyrido[3,4-c]azepine-8(9H)-carboxylate (CAS 1341039-87-9)
- (6-(Trifluoromethyl)-1H-indol-4-yl)methanamine (CAS 1352889-71-4)
- Semaglutide impurity 29 (CAS 110990-08-4)
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