4-Chloro-2-methyl-5-(phenylethynyl)pyridazin-3(2H)-one CAS 407577-73-5
| CAS No. | 407577-73-5 |
| Molecular Formula | C13H9ClN2O |
| Molecular Weight | 244.68 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 244.68 g/mol gives 4-Chloro-2-methyl-5-(phenylethynyl)pyridazin-3(2H)-one distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
4-Chloro-2-methyl-5-(phenylethynyl)pyridazin-3(2H)-one (CAS 407577-73-5) is a high-purity analytical reference standard with the molecular formula C13H9ClN2O and a molecular weight of 244.68 g/mol.
The molecular framework of 4-Chloro-2-methyl-5-(phenylethynyl)pyridazin-3(2H)-one (C13H9ClN2O) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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.
As a certified reference material (CRM), 4-Chloro-2-methyl-5-(phenylethynyl)pyridazin-3(2H)-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 | C13H9ClN2O |
| Molecular Weight | 244.68 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, 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 |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
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Recommended Standards
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- tetrahydro-2{H}-thiopyran-4-yl 4-methylbenzenesulfonate (CAS 27999-97-9)
- Disopyramide (CAS 3737-09-5)
- Ethyl 1-(4-chlorobenzyl)piperidine-4-carboxylate (CAS 308109-90-2)
- 2-(3-methyl-2,5-dioxoimidazolidin-1-yl)-N-phenylacetamide (CAS 730253-01-7)
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- 5H-Thiopyrano[4,3-d]pyrimidine (CAS 253-89-4)
- Liraglutide Impurity 16 TFA Salt (CAS CATO-C4X-199216)
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