3-(2-Chlorophenyl)-7-hydroxy-2-methyl-4H-1-benzopyran-4-one CAS 328019-68-7
| CAS No. | 328019-68-7 |
| Molecular Formula | C16H11ClO3 |
| Molecular Weight | 286.71 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 3-(2-Chlorophenyl)-7-hydroxy-2-methyl-4H-1-benzopyran-4-one.
CATO supplies 3-(2-Chlorophenyl)-7-hydroxy-2-methyl-4H-1-benzopyran-4-one (CAS 328019-68-7), a certified reference material (molecular formula C16H11ClO3, MW 286.71 g/mol) for analytical method development and quality control.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, a polycyclic aromatic system, 3-(2-Chlorophenyl)-7-hydroxy-2-methyl-4H-1-benzopyran-4-one is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 286.71 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures 3-(2-Chlorophenyl)-7-hydroxy-2-methyl-4H-1-benzopyran-4-one under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
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.) | 2025 |
| Halogen Content | Cl-containing |
Related Chlorophenyl Standards
- 2-(3-Chlorophenyl)-6,7-dihydro-1H-[1,4]dioxino[2',3':4,5]benzo[1,2-d]imidazole (CAS 1097819-40-3)
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- (2E)-2-[2-(2-Chlorophenyl)hydrazin-1-ylidene]-3-oxo-3-phenylpropanal (CAS 339279-47-9)
- (2E)-3-(4-Chlorophenyl)-3-oxo-2-(2-phenylhydrazin-1-ylidene)propanal (CAS 337512-10-4)
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Recommended Standards
- 3-(2’-Chlorophenyl)-7-methoxycoumarin (CAS 263365-37-3)
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- 2-Chloro-N-(2-oxoindolin-5-yl)benzamide (CAS 921545-53-1)
- 3-(4'-Chlorophenyl)-6-methoxycoumarin (CAS 262591-08-2)
- Benzyl 2-(tert-butyl)-3-methyl-4-oxoimidazolidine-1-carboxylate (CAS 111610-19-6)
- D-Histidine, 1-[(1,1-dimethylethoxy)carbonyl]-N-[(9H-fluoren-9-ylmethoxy)carbonyl]-, compd. with cyclohexanamine (1:1) (CAS 210755-31-0)
- 4-Methoxy-3,4-diphenylisoxazol-5(4H)-one (CAS 89773-83-1)
- 3-Iodo-5-(trifluoromethyl)pyridine (CAS 1214333-22-8)
- (3-Chloro-2-iodophenyl)methanol (CAS 1261614-27-0)
- 2-(4,5-Dimethoxy-2-(indolin-1-ylsulfonyl)phenyl)acetic acid (CAS 1797040-31-3)
- 2-Bromo-5-fluoro-N,N-dimethylbenzamide (CAS 951884-08-5)
- 2-Methyl-2-[(methylamino)methyl]propane-1,3-diol (CAS 82718-60-3)
- 6-Fluoro-4-hydroxy-8-methylquinoline-3-carbohydrazide (CAS 1315347-45-5)
- Insulin Degludec impurity 4 (CAS CATO-C4X-21574)
Why CATO?
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