Dalilesen Impurity 4 CAS 2901043-05-6
| CAS No. | 2901043-05-6 |
| Molecular Formula | C22H21ClN6O2 |
| Molecular Weight | 436.89 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 Dalilesen Impurity 4.
Dalilesen Impurity 4 (CAS 2901043-05-6) is a certified pharmaceutical impurity reference standard with the molecular formula C22H21ClN6O2 and a molecular weight of 436.89 g/mol.
Structurally, Dalilesen Impurity 4 (C22H21ClN6O2) contains a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 15.0, corresponding to approximately 15 ring(s) or double-bond equivalent(s). With a molecular weight of 436.89 g/mol, it falls into the moderately-high-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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), Dalilesen 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 | C22H21ClN6O2 |
| Molecular Weight | 436.89 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2004 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 6 |
Related Dalilesen Standards
- Dalilesen impurity 12 (CAS CATO-C4X-301012)
- Dalilesen Impurity 22 (CAS CATO-C4X-301022)
- Dalilesen impurity 38 (CAS 1505484-57-0)
- Dalilesen Impurity 8 (CAS 1505484-72-9)
- Dalilesen Impurity 16 (CAS CATO-C4X-301016)
- Dalilesen impurity 39 (CAS 1505484-96-7)
- Dalilesen Impurity 5 (CAS 1505485-09-5)
- Dalilesen Impurity 31 (CAS CATO-C4X-301031)
Recommended Standards
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- 3-({4-Amino-6-[methyl(phenyl)amino]-1,3,5-triazin-2-yl}methyl)-5-chloro-1,3-benzoxazol-2(3H)-one (CAS 903202-10-8)
- 4-[(3-Ethynylphenyl)amino]-7-(2-methoxyethoxy)-6-quinazolinol (CAS 183322-38-5)
- 42-O-tert-Butyldimethylsilyloxyethyl-d4 Rapamycin (CAS 1356839-88-7)
- (6S,11AR,11bS)-9,10,11,11a-tetrahydro-8H-6,11b-methanofuro[2,3-c]pyrido[1,2-a]azepin-2(6H)-one 5588-52-3 5626AE C13H15NO2 (CAS 5588-52-3)
- Semaglutide impurity 210 (CAS CATO-C4X-2226210)
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