(3E)-3-[(4-Chloro-3-nitrophenyl)methylidene]-3,4-dihydro-2H-1-benzopyran-4-one CAS 790683-49-7
| CAS No. | 790683-49-7 |
| Molecular Formula | C16H10ClNO4 |
| Molecular Weight | 315.71 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), (3E)-3-[(4-Chloro-3-nitrophenyl)methylidene]-3,4-dihydro-2H-1-benzopyran-4-one meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
CATO supplies (3E)-3-[(4-Chloro-3-nitrophenyl)methylidene]-3,4-dihydro-2H-1-benzopyran-4-one (CAS 790683-49-7), a certified reference material (molecular formula C16H10ClNO4, MW 315.71 g/mol) for analytical method development and quality control.
Structurally, (3E)-3-[(4-Chloro-3-nitrophenyl)methylidene]-3,4-dihydro-2H-1-benzopyran-4-one (C16H10ClNO4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 12.0, corresponding to approximately 12 ring(s) or double-bond equivalent(s). With a molecular weight of 315.71 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C16H10ClNO4 |
| Molecular Weight | 315.71 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 |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1986 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
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Recommended Standards
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