4-[1-(Benzenesulfonyl)ethyl]-5-ethyl-1-[(thiophen-2-yl)methyl]-2,3-dihydro-1H-imidazol-2-one CAS 439096-18-1
| CAS No. | 439096-18-1 |
| Molecular Formula | C18H20N2O3S2 |
| Molecular Weight | 376.49 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| 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 4-[1-(Benzenesulfonyl)ethyl]-5-ethyl-1-[(thiophen-2-yl)methyl]-2,3-dihydro-1H-imidazol-2-one.
4-[1-(Benzenesulfonyl)ethyl]-5-ethyl-1-[(thiophen-2-yl)methyl]-2,3-dihydro-1H-imidazol-2-one (CAS 439096-18-1), molecular formula C18H20N2O3S2 and molecular weight 376.49 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C18H20N2O3S2, 4-[1-(Benzenesulfonyl)ethyl]-5-ethyl-1-[(thiophen-2-yl)methyl]-2,3-dihydro-1H-imidazol-2-one contains a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 376.49 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C18H20N2O3S2 |
| Molecular Weight | 376.49 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 2 |
Related Benzenesulfonyl Standards
- 5-[(Benzenesulfonyl)methyl]-2-{[(4-fluorophenyl)methyl]sulfanyl}-1-methyl-1H-imidazole (CAS 338795-01-0)
- 1-(Benzenesulfonyl)-4-{[(4-methylphenyl)sulfanyl]methyl}piperidin-4-ol (CAS 478029-36-6)
- (5-Benzenesulfonyl-2-phenyl-3H-imidazol-4-ylsulfanyl)-acetic acid (CAS 1171935-29-7)
- 5-(Benzenesulfonyl)-4-(2,4-dichlorophenyl)-2-methylpyrimidine (CAS 339107-88-9)
- 5-(Benzenesulfonyl)-2-phenyl-4-(piperidin-1-yl)pyrimidine (CAS 339106-33-1)
- 5-(Benzenesulfonyl)-4-phenyl-2-(pyridin-2-yl)pyrimidine (CAS 339108-07-5)
- 5-(Benzenesulfonyl)-4-phenyl-2-(pyridin-3-yl)pyrimidine (CAS 339108-09-7)
- 7-(Benzenesulfonyl)-6-bromo-2-chloro-7H-pyrrolo[2,3-d]pyrimidine (CAS 1638767-50-6)
Recommended Standards
- 3-[4-(4-Methoxyphenyl)piperazin-1-yl]-1-(naphthalen-2-yl)propan-1-ol (CAS 477328-90-8)
- 5-Amino-1-(6-hydrazinylpyridazin-3-yl)-1H-pyrazole-4-carboxamide (CAS 71657-33-5)
- 3-[2-(3,4-dimethoxyphenyl)ethyl]-6-ethyl-2-mercaptothieno[2,3-d]pyrimidin-4(3H)-one (CAS 588682-61-5)
- 6,6'-((2-Hydroxy-5-methyl-1,3-phenylene)bis(methylene))bis(2,4-dimethylphenol) (CAS 35924-04-0)
- Defluoro Hydroxy AM-694 (CAS 335160-94-6)
- [2,3,5,6-Tetrafluoro-4-(trifluoromethyl)phenyl]hydrazine (CAS 1868-85-5)
- 5-bromobenzofuran-7-carbaldehyde (CAS 170681-94-4)
- 2-amino-1-methyl-1H-1,3-benzodiazole-6-carbonitrile (CAS 141691-42-1)
- Ethyl 3-[Benzyl(methyl)amino]propanoate (CAS 25772-94-5)
- 2-((6-Chloropyrimidin-4-yl)oxy)benzonitrile (CAS 913846-53-4)
- Belumosudil Impurity 66 (CAS CATO-C4X-298866)
- 4-(3,5-dimethoxyanilino)-1,1,1-trifluorobut-3-en-2-one (CAS 176722-56-8)
- 3-(pyridin-3-yl)but-2-enoic acid (CAS 860413-81-6)
- 30003-72-6 insulin chain b oxidized (CAS 30003-72-6)
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