4,5-Dichloro-2-(4-methoxyphenyl)-2,3-dihydropyridazin-3-one CAS 41933-34-0
| CAS No. | 41933-34-0 |
| Molecular Formula | C11H8Cl2N2O2 |
| Molecular Weight | 271.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4,5-Dichloro-2-(4-methoxyphenyl)-2,3-dihydropyridazin-3-one (CAS 41933-34-0) is a high-purity analytical reference standard with the molecular formula C11H8Cl2N2O2 and a molecular weight of 271.10 g/mol.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution, 4,5-Dichloro-2-(4-methoxyphenyl)-2,3-dihydropyridazin-3-one is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 271.10 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
As a certified reference material (CRM), 4,5-Dichloro-2-(4-methoxyphenyl)-2,3-dihydropyridazin-3-one 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.
Physical & Chemical Properties
| Molecular Formula | C11H8Cl2N2O2 |
| Molecular Weight | 271.10 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, keep tightly closed to prevent evaporation |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1968 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Dichloro Standards
- Ethyl 4,8-dichloro-1,7-naphthyridine-3-carboxylate (CAS 1093114-45-4)
- Ethyl 2,4-dichloro-1,6-naphthyridine-3-carboxylate (CAS 1186189-34-3)
- Ethyl 2,4-dichloro-1,5-naphthyridine-3-carboxylate (CAS 1312605-84-7)
- 4,6-Dichloro-5-(2-methoxyphenoxy)pyrimidine (CAS 150727-23-4)
- 2,4-Dichloro-N-(5-methylisoxazol-3-yl)benzamide (CAS 160856-95-1)
- 2,5-Dichloro-4-(4-methoxyphenoxy)pyrimidine (CAS 358978-09-3)
- 2,6-Dichloro-4-(3-hydroxyphenoxy)phenol (CAS 2031170-79-1)
- 4,5-Dichloro-2-(4,6-dimethylpyrimidin-2-yl)-2,3-dihydropyridazin-3-one (CAS 78403-59-5)
Recommended Standards
- 4,6-Dichloro-N-(2-methoxyphenyl)-1,3,5-triazin-2-amine (CAS 30369-87-0)
- 4-(Trifluoromethylthio)benzyl Bromide (CAS 21101-63-3)
- 4-Bromo-1-(methylthio)-2-(trifluoromethyl)-benzene (CAS 300356-31-4)
- 3,4-DIHYDRO-5-(4-IODOPHENYL)-2H-PYRROLE (CAS 374589-01-2)
- D-allo-Thr7-Semaglutide (CAS CATO-C4X-2226242)
- 2-((3-(3-Bromophenyl)-1H-1,2,4-triazol-5-yl)thio)-N-(4-chlorophenyl)acetamide (CAS 332128-25-3)
- N-(3,5-dimethylphenyl)piperidine-2-carboxamide hydrochloride (CAS 205993-83-5)
- 1-(5-(Trifluoromethoxy)pyridin-3-yl)ethan-1-ol (CAS 2833706-91-3)
- 2-(4-Ethoxyphenyl)-6-methylquinoline-4-carboxylic acid (CAS 438221-64-8)
- 2-(((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)methyl)butanoic acid (CAS 180181-95-7)
- (S)-2-Amino-3-(4-borono-2-fluorophenyl)propanoic Acid (CAS 1604798-48-2)
- 2-Methyl-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid (CAS 54329-54-3)
- Lithium 3-(azetidin-1-yl)propanoic acid (CAS 2102410-37-5)
- Semaglutide Impurity 166 (CAS 1395881-03-4)
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