3-[(E)-2-[(3,5-Dichlorophenyl)amino]-1-nitroethenyl]-1,3-dihydro-2-benzofuran-1-one CAS 320420-36-8
| CAS No. | 320420-36-8 |
| Molecular Formula | C16H10Cl2N2O4 |
| Molecular Weight | 365.17 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-[(E)-2-[(3,5-Dichlorophenyl)amino]-1-nitroethenyl]-1,3-dihydro-2-benzofuran-1-one (CAS 320420-36-8), molecular formula C16H10Cl2N2O4 and molecular weight 365.17 g/mol, is a CATO reference standard with documented purity and traceability.
3-[(E)-2-[(3,5-Dichlorophenyl)amino]-1-nitroethenyl]-1,3-dihydro-2-benzofuran-1-one (C16H10Cl2N2O4) 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).
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 | C16H10Cl2N2O4 |
| Molecular Weight | 365.17 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related E Standards
- (E)-5-(2-(5-(2,4-dichlorophenyl)furan-2-yl)vinyl)-3-methyl-4-nitroisoxazole (CAS 338756-56-2)
- 3-(3-(2,3-Dichlorophenyl)-2,4-dioxoimidazolidin-1-yl)benzoic acid (CAS 651748-65-1)
- 3-[(E)-2-[(2,4-Dichlorophenyl)amino]-1-nitroethenyl]-1,3-dihydro-2-benzofuran-1-one (CAS 339023-54-0)
- 1-(2,4-Dichlorophenyl)-N-(4-fluorophenyl)-5-methyl-1H-1,2,4-triazole-3-carboxamide (CAS 338398-15-5)
- 1-(2,5-dichlorophenyl)-N-(4-fluorophenyl)-5-methyl-1H-1,2,4-triazole-3-carboxamide (CAS 338398-37-1)
- 1-(3,5-Dichlorophenyl)-N-(4-fluorophenyl)-5-methyl-1H-1,2,4-triazole-3-carboxamide (CAS 338408-23-4)
- Methyl 5-(3,4-dichlorophenyl)-1-(4-fluorophenyl)-1H-pyrazole-3-carboxylate (CAS 318256-22-3)
- N-(2,4-Dichlorophenyl)-1-(4-fluorophenyl)-5-methyl-1H-1,2,4-triazole-3-carboxamide (CAS 338398-12-2)
Recommended Standards
- 4-(N-Iodoacetamide)benzophenone (CAS 76809-63-7)
- 5-((4-Bromophenyl)thio)-1-methyl-3-(trifluoromethyl)-1H-pyrazole-4-carbaldehyde (CAS 321848-45-7)
- 2-Amino-4-(2,6-dichlorophenyl)-6-(hydroxymethyl)-8-oxo-4H,8H-pyrano[3,2-b]pyran-3-carbonitrile (CAS 664999-54-6)
- Chloramphenicol 1-Acetate (CAS 23214-93-9)
- 2-(2,2,2-trifluoroethyl)benzaldehyde (CAS 158884-42-5)
- 3-((1-Methoxypropan-2-yl)oxy)-1H-pyrazol-5-amine (CAS 1000896-45-6)
- 11-(3-Chlorophenyl)-2,3-dimethoxy-5,11,12,12a-tetrahydropyrazolo[3',4':4,5]pyrido[2,1-a]isoquinolin-8(6H)-one (CAS 860788-93-8)
- 6-Chloro-3-(cyanomethyl)-5-(difluoromethyl)picolinonitrile (CAS 1805973-08-3)
- tert-Butyl 5-bromo-3-formyl-1H-indole-1-carboxylate (CAS 325800-39-3)
- 3-(1,1-dioxidoisothiazolidin-2-yl)-4-fluoroaniline (CAS 1016760-55-6)
- 6-Amino-2-(difluoromethyl)-5-iodopyridine-3-sulfonamide (CAS 1806794-44-4)
- N1-ethyl-N1-(4-methoxybenzyl)ethane-1,2-diamine (CAS 32462-78-5)
- 3-Methoxy-2-pyrrolidinomethyl benzophenone (CAS 898774-14-6)
- Tirzepatide Impurity 57 (CAS CATO-C4X-324057)
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