4-(3,4-Dichlorophenyl)-2-methylphthalazin-1(2H)-one CAS 4725-84-2
| CAS No. | 4725-84-2 |
| Molecular Formula | C15H10Cl2N2O |
| Molecular Weight | 305.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-(3,4-Dichlorophenyl)-2-methylphthalazin-1(2H)-one (CAS 4725-84-2), molecular formula C15H10Cl2N2O and molecular weight 305.16 g/mol, is a CATO reference standard with documented purity and traceability.
4-(3,4-Dichlorophenyl)-2-methylphthalazin-1(2H)-one (C15H10Cl2N2O) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. Halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C15H10Cl2N2O |
| Molecular Weight | 305.16 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 |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Dichlorophenyl Standards
- N4-(2,3-Dichlorophenyl)-N2,N2-dimethyl-L-asparagine (CAS 1025759-21-0)
- N4-(2,3-Dichlorophenyl)-N2-ethyl-L-asparagine (CAS 1037507-68-8)
- n-(3,4-Dichlorophenyl)-1h-indole-6-carboxamide (CAS 1147677-22-2)
- 3-[(E)-(3,4-Dichlorophenyl)methylidene]-2,3-dihydro-4H-chromen-4-one (CAS 1262616-93-2)
- N4-(2,4-Dichlorophenyl)quinazoline-4,6-diamine (CAS 1428063-66-4)
- (3E)-3-[(2,4-Dichlorophenyl)methylidene]-3,4-dihydro-2H-1-benzopyran-4-one (CAS 1705584-19-5)
- 1-(3,4-Dichlorophenyl)-5-(m-tolyl)-1H-tetrazole (CAS 338411-36-2)
- 2-(2,4-Dichlorophenyl)-4-methylphthalazin-1(2H)-one (CAS 332056-23-2)
Recommended Standards
- 4-(2-Chlorophenyl)-2-(4-chlorophenyl)-1,2-dihydro-3H-pyrazol-3-one (CAS 400076-69-9)
- 4,5-Dichloro-2-(1-phenyl-1H-pyrazol-5-yl)phenol (CAS 288401-50-3)
- 4-(2-Chlorophenyl)-2-(3-chlorophenyl)-1,2-dihydro-3H-pyrazol-3-one (CAS 400076-68-8)
- 4,6-Dichloro-2-(4-methoxy-phenyl)-quinazoline (CAS 461036-87-3)
- 4-Amino-2,2,6,6-tetramethylpiperidin-1-ol (CAS 76462-91-4)
- Methyl 5-cyano-6-(dimethylamino)-2-methylnicotinate (CAS 860649-57-6)
- Methyl 4-(3-chlorophenyl)-4-nitrobutanoate (CAS 1236302-40-1)
- 1-(4-(Dimethylamino)-2-nitrophenyl)ethanone (CAS 13210-36-1)
- Tetrasodium Ethylenediaminetetraacetate Dihydrate (CAS 10378-23-1)
- 4-Chloro-3-(2-(2-chloro-4-nitrophenoxy)acetamido)benzene-1-sulfonyl fluoride (CAS 25299-94-9)
- 2-(4-Fluoro-2-(isoxazol-5-yl)phenoxy)acetic acid (CAS 763109-04-2)
- 1-Ethyl-1h-indazole-6-carboxylic acid (CAS 1260759-87-2)
- Crisaborole lmpurity 84 (CAS CATO-C4X-202184)
- D-[His]1-Semaglutide X TFA salt (CAS CATO-CPTD788634)
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