MK-4965 CAS 920035-77-4
| CAS No. | 920035-77-4 |
| Molecular Formula | C20H13Cl2N5O2 |
| Molecular Weight | 426.26 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
MK-4965 (CAS 920035-77-4), molecular formula C20H13Cl2N5O2 and molecular weight 426.26 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution, MK-4965 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 426.26 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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.
Physical & Chemical Properties
| Molecular Formula | C20H13Cl2N5O2 |
| Molecular Weight | 426.26 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 16.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 5 |
Recommended Standards
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- 3-(2,6-Dichlorobenzyl)-2-methyl-1-(3-(trifluoromethyl)benzyl)pyridin-4(1H)-one (CAS 339017-50-4)
- Canagliflozin Impurity 18 (CAS CATO-C4X-112318)
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- Revefenacin Impurity 39 (CAS 1284980-54-6)
- 3-(2-(4-Methoxybenzylidene)hydrazinyl)-5,6-diphenyl-1,2,4-triazine (CAS 101379-65-1)
- 3-Ethylpentan-1-ol (CAS 66225-51-2)
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- (5,7-Dibromo-1-benzofuran-2-yl)(phenyl)methanol (CAS 83806-48-8)
- (2-Chloro-3,3,3-trifluoroprop-1-en-1-yl)benzene (CAS 104696-00-6)
- Hippocampal Cholinergic Neurostimulating Peptide (CAS 140158-49-2)
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