5-Chloro-2-methylpyridazin-3(2H)-one CAS 14628-34-3
| CAS No. | 14628-34-3 |
| Molecular Formula | C5H5ClN2O |
| Molecular Weight | 144.56 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 5-Chloro-2-methylpyridazin-3(2H)-one is closely related to an amide group, a hydroxyl group, an ether linkage, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
5-Chloro-2-methylpyridazin-3(2H)-one (CAS 14628-34-3), molecular formula C5H5ClN2O and molecular weight 144.56 g/mol, is a CATO reference standard with documented purity and traceability.
5-Chloro-2-methylpyridazin-3(2H)-one (C5H5ClN2O) contains an amide group, a hydroxyl group, an ether linkage, chlorine substitution. Halogen substitution raises its density and boiling point; 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 | C5H5ClN2O |
| Molecular Weight | 144.56 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) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1961 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Chloro Standards
- 6-Chloro-5-methylpyrimidin-2(1H)-one (CAS 101080-24-4)
- 4-Chloro-2-methylpyrimidin-5-ol (CAS 103660-23-7)
- 5-Chloro-4-methyl-2,3-dihydropyridazin-3-one (CAS 104566-45-2)
- 2-Chloro-5-(hydroxymethyl)pyrimidine (CAS 1046816-75-4)
- 4-Chloro-5-methyl-1H-pyrazole-3-carbaldehyde (CAS 1050642-24-4)
- 5-Chloro-3-methylpyrazin-2(1H)-one (CAS 105985-18-0)
- 5-Chloro-4-methylpyrimidine 1-oxide (CAS 114969-55-0)
- 5-Chloro-4-methoxypyrimidine (CAS 114969-94-7)
Recommended Standards
- 1-Methyl-1H-imidazole-4-carbonyl chloride (CAS 143165-09-7)
- 2-Chloropyrimidine-4,5-diamine (CAS 14631-08-4)
- (5-Chloro-1,2,4-triazin-6-yl)methanamine (CAS 1393583-92-0)
- 4-Chloropyrimidine-2,5-diamine (CAS 14631-09-5)
- 6-Aminobenzo[d]isoxazole-3-carbonitrile (CAS 343868-60-0)
- 7-(tert-Butyl)-4-chloro-7H-pyrrolo[2,3-d]pyrimidine (CAS 1402444-77-2)
- 2-Azido-N-(2-(2,5-dimethoxyphenyl)-2-hydroxyethyl)acetamide (CAS 60681-97-2)
- 3,5-Dichloro-2-(piperidin-3-yloxy)pyridine (CAS 1247886-35-6)
- 6-Chloro-1,3-dihydroxy-9H-xanthen-9-one (CAS 61101-89-1)
- Ethyl 1-methyl-4-(phenethylamino)-1H-pyrazolo[3,4-b]pyridine-5-carboxylate (CAS 160034-52-6)
- Rosuvastatin Impurity 188 (CAS CATO-C4X-1169188)
- n1-(4-Chlorobenzyl)-n3,n3-dimethylpropane-1,3-diamine (CAS 893583-06-7)
- Propane-1,2-diyl dipropionate (CAS 10108-80-2)
- Hexapeptide-11 (CAS 100684-36-4)
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