4-Oxo-2-phenylquinazolin-3(4H)-yl 4-chlorobenzenesulfonate CAS 130536-25-3
| CAS No. | 130536-25-3 |
| Molecular Formula | C20H13ClN2O4S |
| Molecular Weight | 412.85 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
4-Oxo-2-phenylquinazolin-3(4H)-yl 4-chlorobenzenesulfonate (CAS 130536-25-3), molecular formula C20H13ClN2O4S and molecular weight 412.85 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C20H13ClN2O4S, 4-Oxo-2-phenylquinazolin-3(4H)-yl 4-chlorobenzenesulfonate contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 412.85 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.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C20H13ClN2O4S |
| Molecular Weight | 412.85 g/mol |
| 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) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1994 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Oxo Standards
- 2-(4-Oxo-2-phenylquinazolin-3(4H)-yl)-N-(phenylcarbamothioyl)acetamide (CAS 72045-60-4)
- 2-(4-Oxo-2-phenylquinazolin-3(4H)-yl)ethyl 2-nitrobenzoate (CAS 90094-94-3)
- 2-(4-Oxo-2-phenylquinazolin-3(4H)-yl)-N-(m-tolylcarbamothioyl)acetamide (CAS 72045-62-6)
- 2-(4-Oxo-2-phenylquinazolin-3(4H)-yl)-N-(o-tolylcarbamothioyl)acetamide (CAS 72045-61-5)
- 2-((2-Phenylquinazolin-4-yl)thio)-N-(p-tolyl)acetamide (CAS 332914-52-0)
- 2-(4-Oxo-2-phenylquinazolin-3(4H)-yl)ethyl benzoate (CAS 90094-99-8)
- Ethyl 4-((2-phenylquinazolin-4-yl)oxy)benzoate (CAS 866155-22-8)
- 1-Phenyl-2-((2-phenylquinazolin-4-yl)thio)ethanone (CAS 61580-05-0)
Recommended Standards
- Fenasulam (CAS 78357-48-9)
- (E)-{[6-(4-chlorophenyl)imidazo[2,1-b][1,3]thiazol-5-yl]methylidene}[(4-nitrophenyl)methoxy]amine (CAS 338404-56-1)
- 3-(2-Chloro-4-fluorobenzyl)-5-(6-methoxynaphthalen-2-yl)-5-methylimidazolidine-2,4-dione (CAS 956782-57-3)
- Avanafil Impurity 136 (CAS CATO-C4X-1118136)
- 2-(Azetidin-3-yloxy)-N,N-dimethylacetamide hydrochloride (CAS 1376324-18-3)
- 2-Amino-N-(2,2,2-trifluoroethyl)acetamide (CAS 359821-38-8)
- (1-(2-Methylpyridin-4-yl)-1H-pyrazol-4-yl)boronic acid (CAS 2225174-15-0)
- (R)-1-(Furan-3-yl)ethan-1-amine (CAS 1213091-54-3)
- 2,2-Dimethyl-3-(thiomorpholine-4-carbonyl)cyclopropane-1-carboxylic acid (CAS 1142215-03-9)
- 3-(4-Aminophenyl)-5-methylisoxazole-4-carboxylic acid (CAS 7035-83-8)
- 6-Amino-2-sulfanyl-4-pyrimidinecarboxylic acid (CAS 16490-16-7)
- 2-Methylthiazole (CAS 3581-87-1)
- Methyl 3-(4-Methoxyphenoxy)benzoate (CAS 64691-60-7)
- Fibrinogen-Binding Inhibitor Peptide (CAS 89105-94-2)
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