3-(4-Chlorophenyl)-7-hydroxy-4-methyl-2h-chromen-2-one CAS 31913-52-7
| CAS No. | 31913-52-7 |
| Molecular Formula | C16H11ClO3 |
| Molecular Weight | 286.71 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.
3-(4-Chlorophenyl)-7-hydroxy-4-methyl-2h-chromen-2-one (CAS 31913-52-7) is a high-purity analytical reference standard with the molecular formula C16H11ClO3 and a molecular weight of 286.71 g/mol.
Based on its molecular formula C16H11ClO3, 3-(4-Chlorophenyl)-7-hydroxy-4-methyl-2h-chromen-2-one contains a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, a polycyclic aromatic system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 286.71 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
Physical & Chemical Properties
| Molecular Formula | C16H11ClO3 |
| Molecular Weight | 286.71 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Halogen Content | Cl-containing |
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Recommended Standards
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- 3-(4-Fluorophenoxy)benzenesulfonyl chloride (CAS 885950-85-6)
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- 2-Bromo-5-(dimethylamino)benzaldehyde (CAS 828916-47-8)
- (2R)-2-Amino-3-((E)-prop-1-en-1-ylsulfinyl)propanoic acid (CAS 434322-95-9)
- 5-Bromo-2-(1H-imidazol-2-yl)pyridine (CAS 1211586-40-1)
- 4-Methylbenzo[4,5]imidazo[1,2-a]pyrimidine (CAS 202207-09-8)
- 1-(4-Amino-3-fluorophenyl)pyridin-2-one (CAS 536747-52-1)
- N-[2-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-4-pyridyl]hexanamide (CAS 2246704-76-5)
- Semaglutide Impurity 189 (CAS CATO-C4X-2226189)
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