Methyl 3-benzamido-6-[(2Z)-2-{[(3,4-dichlorophenyl)methoxy]imino}ethyl]-2-oxo-2H-pyran-5-carboxylate CAS 303986-18-7
| CAS No. | 303986-18-7 |
| Molecular Formula | C23H18Cl2N2O6 |
| Molecular Weight | 489.30 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.
Methyl 3-benzamido-6-[(2Z)-2-{[(3,4-dichlorophenyl)methoxy]imino}ethyl]-2-oxo-2H-pyran-5-carboxylate (CAS 303986-18-7), molecular formula C23H18Cl2N2O6 and molecular weight 489.30 g/mol, is a CATO reference standard with documented purity and traceability.
Methyl 3-benzamido-6-[(2Z)-2-{[(3,4-dichlorophenyl)methoxy]imino}ethyl]-2-oxo-2H-pyran-5-carboxylate (C23H18Cl2N2O6) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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 | C23H18Cl2N2O6 |
| Molecular Weight | 489.30 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) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Methyl Standards
- Methyl 3-benzamido-6-[(2Z)-2-{[(2,4-dichlorophenyl)methoxy]imino}ethyl]-2-oxo-2H-pyran-5-carboxylate (CAS 303986-17-6)
- Methyl 3-benzamido-2-oxo-6-[(E)-2-[(4-phenoxyphenyl)amino]ethenyl]-2H-pyran-5-carboxylate (CAS 341966-25-4)
- 6,9-Bis(benzamido)-2-ethoxyacridine 10-oxide (CAS 95299-77-7)
- Methyl 2-benzamido-5-((4-(ethoxycarbonyl)phenyl)carbamoyl)-4-methylthiophene-3-carboxylate (CAS 335410-92-9)
- 3-Benzamido-N-(5-chloro-4-((4-chlorophenyl)(cyano)methyl)-2-methylphenyl)-4-methylbenzamide (CAS 945371-38-0)
- (S)-(((1-(4-Benzamido-2-oxopyrimidin-1(2H)-yl)-3-hydroxypropan-2-yl)oxy)methyl)phosphonic acid (CAS 132336-37-9)
- ((2-Benzamido-5-bromophenyl)(phenyl)methyl)glycine (CAS 313650-48-5)
- Methyl 2-benzamido-5-((2-ethoxyphenyl)carbamoyl)-4-methylthiophene-3-carboxylate (CAS 335408-24-7)
Recommended Standards
- tert-Butyl (5-(tributylstannyl)thiazol-2-yl)carbamate (CAS 243972-26-1)
- tert-Butyl 4-((5-bromo-2-(trifluoromethoxy)phenyl)sulfonyl)piperazine-1-carboxylate (CAS 1704069-30-6)
- Tadalafil Impurity 108 (CAS CATO-C4X-1087108)
- 4-(2,6-Dichlorophenyl)-2-methyl-6-[(E)-2-{[4-(trifluoromethoxy)phenyl]amino}ethenyl]pyridine-3,5-dicarbonitrile (CAS 303148-23-4)
- 3-(2-Methyl-1,3-thiazol-5-yl)propanoic acid (CAS 60588-57-0)
- Methyl 3-(2,6-difluorophenyl)-3-oxopropanoate (CAS 106816-08-4)
- 5-((1H-imidazol-1-yl)methyl)-2-chlorothiazole (CAS 478081-28-6)
- [5-chloro-6-(propan-2-yloxy)pyridin-3-yl]methanol (CAS 1247194-55-3)
- 1-(4-Chloro-1H-benzo[d]imidazol-2-yl)ethan-1-amine (CAS 1184513-20-9)
- 3-phenyl-1-(1H-pyrrol-1-yl)propan-1-one (CAS 112448-69-8)
- 6-(2,2,2-Trifluoroethoxy)-1,3-benzothiazol-2-amine (CAS 131395-08-9)
- 1-(Bromomethyl)-3-ethoxycyclobutane (CAS 1694151-62-6)
- 2-Chloro-5-cyclopropoxy-N-methylisonicotinamide (CAS 1243461-42-8)
- Cyclopeptide-5 (CAS 197172-76-2)
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