2-(3-Chlorophenyl)-4-[3-(3,5-dimethoxyphenyl)-1,2,4-oxadiazol-5-yl]-1,2-dihydrophthalazin-1-one CAS 1291857-25-4
| CAS No. | 1291857-25-4 |
| Molecular Formula | C24H17ClN4O4 |
| Molecular Weight | 460.87 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 2-(3-Chlorophenyl)-4-[3-(3,5-dimethoxyphenyl)-1,2,4-oxadiazol-5-yl]-1,2-dihydrophthalazin-1-one.
2-(3-Chlorophenyl)-4-[3-(3,5-dimethoxyphenyl)-1,2,4-oxadiazol-5-yl]-1,2-dihydrophthalazin-1-one (CAS 1291857-25-4), molecular formula C24H17ClN4O4 and molecular weight 460.87 g/mol, is a CATO reference standard with documented purity and traceability.
2-(3-Chlorophenyl)-4-[3-(3,5-dimethoxyphenyl)-1,2,4-oxadiazol-5-yl]-1,2-dihydrophthalazin-1-one (C24H17ClN4O4) 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 | C24H17ClN4O4 |
| Molecular Weight | 460.87 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| 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) | 18.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 4 |
Related Chlorophenyl Standards
- 2-(3-Chlorophenyl)-4-[3-(3,4-dimethoxyphenyl)-1,2,4-oxadiazol-5-yl]-1,2-dihydrophthalazin-1-one (CAS 1291852-17-9)
- N-(4-chlorophenyl)-1-((2,2-difluorobenzo[d][1,3]dioxol-5-yl)methyl)-N-isopropyl-2-oxo-1,2-dihydropyridine-3-carboxamide (CAS 400083-08-1)
- Ethyl 4-(4-chlorophenyl)-2-(2-(4-nitrophenoxy)acetamido)thiophene-3-carboxylate (CAS 374598-53-5)
- 3-(4-Chlorophenyl)-11,12-dimethoxy-8,9,13b,14-tetrahydro-6H-pyrazolo[5'',1'':2',3']pyrimido[4',5':4,5]pyrido[2,1-a]isoquinolin-6-one (CAS 685107-16-8)
- Methyl 5-(4-chlorophenyl)-4,6-dioxo-1,3-diphenyl-octahydropyrrolo[3,4-c]pyrrole-1-carboxylate (CAS 317821-76-4)
- 3-(4-Chlorophenyl)-5-((2,4-dichlorobenzyl)thio)-4-(p-tolyl)-4H-1,2,4-triazole (CAS 443740-26-9)
- 3-(4-Chlorophenyl)-5-((2,6-dichlorobenzyl)thio)-4-(p-tolyl)-4H-1,2,4-triazole (CAS 476485-86-6)
- 3-(4-Chlorophenyl)-5-((3,4-dichlorobenzyl)thio)-4-(p-tolyl)-4H-1,2,4-triazole (CAS 477332-69-7)
Recommended Standards
- C.I. Pigment red 14 (CAS 6471-50-7)
- Anhydrochlortetracycline (CAS 4497-08-9)
- N-(2-((4-chloro-3-nitrophenyl)amino)-2-oxoethyl)-N-cyclohexyl-3-nitrobenzamide (CAS 332156-19-1)
- Aureomycin EP Impurity K (CAS 81163-11-3)
- 1-bromomethyl-2,4-dimethoxybenzene (CAS 161919-74-0)
- 5,6-Dimethylpyridin-3-amine (CAS 66093-07-0)
- n-(3,4-Dichlorophenyl)-4,5-dimethyl-1,3-benzothiazol-2-amine (CAS 731779-03-6)
- n-Cyclopentyl-1,2,5-trimethylpiperidin-4-amine (CAS 1218243-08-3)
- 5-(4-Fluoropyrrolidin-2-yl)-3-(methoxymethyl)-1,2,4-oxadiazole hemisulfate (CAS 2097936-55-3)
- 2-(Morpholine-4-sulfonyl)benzonitrile (CAS 612045-76-8)
- Acetaldehyde O-(2-(pyridin-2-yl)pyrimidin-4-yl) oxime (CAS 62846-74-6)
- 4-Arsanilic Acid (CAS 98-50-0)
- [(E)-[(4-Methoxyphenyl)methylidene]amino]urea (CAS 120445-53-6)
- SV40 Nuclear Transport Signal Peptide Analog (CAS 104914-40-1)
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