2-(3-Chlorophenyl)-7-hydroxy-4H-chromen-4-one CAS 127590-88-9
| CAS No. | 127590-88-9 |
| Molecular Formula | C15H9ClO3 |
| Molecular Weight | 272.68 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 2-(3-Chlorophenyl)-7-hydroxy-4H-chromen-4-one (C15H9ClO3) contains a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, a polycyclic aromatic system. The molecule exhibits a degree of unsaturation (DBE) of 11.0, corresponding to approximately 11 ring(s) or double-bond equivalent(s). With a molecular weight of 272.68 g/mol, it falls into the medium-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
2-(3-Chlorophenyl)-7-hydroxy-4H-chromen-4-one (CAS 127590-88-9), molecular formula C15H9ClO3 and molecular weight 272.68 g/mol, is a CATO reference standard with documented purity and traceability.
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 | C15H9ClO3 |
| Molecular Weight | 272.68 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.) | 1993 |
| Halogen Content | Cl-containing |
Related Chlorophenyl Standards
- 2-(3-Chlorophenyl)-6-hydroxy-4H-chromen-4-one (CAS 140439-33-4)
- (4-Chlorophenyl)(5-hydroxy-1-benzofuran-3-yl)methanone (CAS 17249-67-1)
- 3-(2-Chlorophenyl)-7-hydroxy-4H-chromen-4-one (CAS 328020-06-0)
- 3-(2-Chlorophenyl)-7-hydroxycoumarin (CAS 263365-32-8)
- 3-(4-Chlorophenyl)-7-hydroxy-2H-chromen-2-one (CAS 20050-82-2)
- 2-(3-chlorophenyl)-1h-benZimidazole-5-carboxylic acid (CAS 1018278-53-9)
- 5-[(4-chlorophenyl)carbonyl]-2,3-dihydro-1H-1,3-benzodiazol-2-one (CAS 1096942-88-9)
- 2-(2-Chlorophenyl)imidazo[1,2-a]pyridine-3-carboxylic acid (CAS 1267166-99-3)
Recommended Standards
- 6-((tert-Butoxycarbonyl)amino)-4-chloronicotinic acid (CAS 1260670-99-2)
- N-Boc-3-chloro-2-nitroaniline (CAS 1283176-45-3)
- 2-((tert-Butoxycarbonyl)amino)-5-chloroisonicotinic acid (CAS 1260664-53-6)
- 3-((tert-Butoxycarbonyl)amino)-2-chloroisonicotinic acid (CAS 1312105-89-7)
- 2-(((4-Methyl-4h-1,2,4-triazol-3-yl)thio)methyl)piperidine (CAS 1249844-16-3)
- 1-(4-hydroxypiperidin-1-yl)ethan-1-one (CAS 4045-22-1)
- Hexyltriphenylphosphonium bromide (CAS 4762-26-9)
- (Z)-2-benzylidene-4-methylpent-4-enal (CAS 54979-65-6)
- N-((1-(2-Chloroacetyl)pyrrolidin-2-yl)methyl)acetamide (CAS 1353978-34-3)
- 2,6-Bis[(4S)-4,5-dihydro-4-(1-methylethyl)-2-oxazolyl]-3,5-bis(3,3-dimethylbutyl)pyridine (CAS 1869990-01-1)
- tert-Butyl 4-(4-chlorophenyl)-4-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)piperidine-1-carboxylate (CAS 917899-36-6)
- 2-(2-Chlorophenyl)morpholine oxalate (CAS 1185174-82-6)
- N-Methyl-1-(4-(trifluoromethyl)pyridin-2-yl)methanamine (CAS 1060805-52-8)
- Semaglutide Impurity 123 (CAS 71997-93-8)
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