4-(4-Chlorophenyl)-2-(cyclohexylsulfanyl)-4-oxobutanoic acid CAS 328263-32-7
| CAS No. | 328263-32-7 |
| Molecular Formula | C16H19ClO3S |
| Molecular Weight | 326.84 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 326.84 g/mol gives 4-(4-Chlorophenyl)-2-(cyclohexylsulfanyl)-4-oxobutanoic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
4-(4-Chlorophenyl)-2-(cyclohexylsulfanyl)-4-oxobutanoic acid (CAS 328263-32-7), molecular formula C16H19ClO3S and molecular weight 326.84 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 4-(4-Chlorophenyl)-2-(cyclohexylsulfanyl)-4-oxobutanoic acid (C16H19ClO3S) is characterized by a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, a polycyclic aromatic system. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C16H19ClO3S |
| Molecular Weight | 326.84 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Chlorophenyl Standards
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Recommended Standards
- Etoricoxib Impurity 17 (CAS 292067-97-1)
- 4-Chloro-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrrolo[2,3-b]pyridine-5-carboxylic acid (CAS 1039740-71-0)
- 3-Chloro-2-methyl-N-(4-(pyrrolidin-1-yl)but-2-yn-1-yl)benzenesulfonamide (CAS 1396856-52-2)
- 1223748-24-0 2494AD 5-Chloro-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrrolo[2,3-c]pyridine-2-carboxylic acid C14H19ClN2O3Si (CAS 1223748-24-0)
- N-(4-Cyano-5-methoxy-2-nitrophenyl)acetamide (CAS 1196074-42-6)
- tert-Butyl 3-((tosyloxy)methyl)pyrrolidine-1-carboxylate (CAS 114214-70-9)
- Ethyl [(3-fluoro-4-methylphenyl)carbamoyl]formate (CAS 69066-06-4)
- (R)-1-(3-fluoro-4-methylphenyl)pentan-1-amine (CAS 1212935-29-9)
- 2-Cyano-5-oxo-5-(2-thioxothiazolidin-3-yl)pentan-2-yl benzodithioate (CAS 887764-14-9)
- (S)-2-((2S,3R)-3-((tert-Butoxycarbonyl)amino)-2-hydroxy-4-phenylbutanamido)-4-methylpentanoic acid (CAS 87304-15-2)
- N-benzyl-1-(5-methylfuran-2-yl)but-3-en-1-amine (CAS 212117-20-9)
- 6-(Benzyloxy)-2-naphthoic acid (CAS 114804-77-2)
- 5,12-Di-p-tolyl-5,12-dihydrobenzo[b]phenazine (CAS 760188-44-1)
- Liraglutide Impurity 22 (CAS 536721-25-2)
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