Ethyl (E)-2-(2-((3,5-dichlorophenyl)amino)vinyl)-5-oxo-5H-chromeno[2,3-b]pyridine-3-carboxylate CAS 240799-79-5
| CAS No. | 240799-79-5 |
| Molecular Formula | C23H16Cl2N2O4 |
| Molecular Weight | 455.29 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Ethyl (E)-2-(2-((3,5-dichlorophenyl)amino)vinyl)-5-oxo-5H-chromeno[2,3-b]pyridine-3-carboxylate 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 Ethyl (E)-2-(2-((3,5-dichlorophenyl)amino)vinyl)-5-oxo-5H-chromeno[2,3-b]pyridine-3-carboxylate (CAS 240799-79-5), a certified reference material (molecular formula C23H16Cl2N2O4, MW 455.29 g/mol) for analytical method development and quality control.
Structurally, Ethyl (E)-2-(2-((3,5-dichlorophenyl)amino)vinyl)-5-oxo-5H-chromeno[2,3-b]pyridine-3-carboxylate (C23H16Cl2N2O4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 16.0, corresponding to approximately 16 ring(s) or double-bond equivalent(s). With a molecular weight of 455.29 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).
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 | C23H16Cl2N2O4 |
| Molecular Weight | 455.29 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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) | 16.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Recommended Standards
- 1,3-Diethyl 2-{2-[2-chloro-4-(4-chlorophenoxy)phenyl]-2-oxoethyl}-2-hydroxypropanedioate (CAS 400087-53-8)
- 5-Bromo-2-(4-fluorophenyl)-N-methyl-6-(N-methylmethylsulfonamido)benzofuran-3-carboxamide (CAS 1333225-20-9)
- Sodium (4aR,6R,7R,7aS)-6-(6-benzamido-9H-purin-9-yl)-7-hydroxytetrahydro-4H-furo[3,2-d][1,3,2]dioxaphosphinin-2-olate 2-oxide (CAS 1135306-29-4)
- 6-[(2E)-3-[(4-Bromophenyl)amino]prop-2-enoyl]-2-(3,5-dimethylphenyl)-4-methyl-2,3,4,5-tetrahydro-1,2,4-triazine-3,5-dione (CAS 477845-37-7)
- (2R)-3-Fluoro-1,2-propanediol (CAS 32860-39-2)
- 4-Chloro-2-(2-methoxyethyl)-6-(1-methyl-1H-pyrazol-4-yl)pyrimidine (CAS 1708199-18-1)
- 4,5-Dichloro-2-(4-fluorobenzyl)pyridazin-3(2H)-one (CAS 307508-07-2)
- 5-Bromoimidazo[1,2-a]pyrazin-3-amine (CAS 1936126-32-7)
- 5-(Thiophen-2-yl)-1-[3-(trifluoromethyl)phenyl]-1h-1,2,4-triazole-3-carboxylic acid (CAS 929972-60-1)
- 2-(2-METHYLPROPYL)PYRROLIDINE HCL (CAS 1184994-37-3)
- 5-Nitro-3-phenethoxy-1H-indazole (CAS 1365942-40-0)
- a-L-Rhamnopyranosyl-beta-hydroxydecanoyl-beta-hydroxydecanoic acid (CAS 37134-61-5)
- 2,3-Dimethylphenyl cyclopropanecarboxylate (CAS 723759-59-9)
- Calcium-Like Peptide 3 (CAS 261969-05-5)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com