4-Chloro-5-(1-methylhydrazinyl)-2-phenylpyridazin-3(2H)-one CAS 41932-99-4
| CAS No. | 41932-99-4 |
| Molecular Formula | C11H11ClN4O |
| Molecular Weight | 250.68 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO supplies 4-Chloro-5-(1-methylhydrazinyl)-2-phenylpyridazin-3(2H)-one (CAS 41932-99-4), a certified reference material (molecular formula C11H11ClN4O, MW 250.68 g/mol) for analytical method development and quality control.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution, 4-Chloro-5-(1-methylhydrazinyl)-2-phenylpyridazin-3(2H)-one is typically pale yellow to yellow low-melting solid. Its solid-state physicochemical attributes — including a molecular weight of 250.68 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C11H11ClN4O |
| Molecular Weight | 250.68 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1968 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 4 |
Related Chloro Standards
- 2-(5-Chloro-3-methyl-1-phenyl-1H-pyrazol-4-yl)acetic acid (CAS 1007515-51-6)
- 5-(4-Chloro-phenyl)-2-ethyl-2H-pyrazole-3-carboxylic acid (CAS 1015868-72-0)
- 2-Chloro-6-(4-methoxybenzyloxy)pyrazine (CAS 1020995-63-4)
- 4-Chloro-6-(3,4-dimethoxyphenyl)pyrimidine (CAS 103555-31-3)
- 5-Chloro-4-methoxy-2-(p-tolyl)pyridazin-3(2H)-one (CAS 105651-85-2)
- 3-Chloro-6-(2,5-dimethoxyphenyl)pyridazine (CAS 1105194-50-0)
- 3-Chloro-6-(2,4-dimethoxyphenyl)pyridazine (CAS 1105194-90-8)
- 5-(2-Chloro-4-ethoxyphenyl)pyrimidin-2-ol (CAS 1111113-09-7)
Recommended Standards
- 4-Chloro-2-(4-methoxybenzyl)pyridazin-3(2H)-one (CAS 2413481-72-6)
- 4-Chloro-5-ethoxy-2-phenylpyridazin-3(2H)-one (CAS 5509-73-9)
- 4-Benzoyl-4-chloro-1,3-dimethyl-1H-pyrazol-5(4H)-one (CAS 63156-16-1)
- 4-Chloro-5-methoxy-2-(p-tolyl)pyridazin-3(2H)-one (CAS 478080-46-5)
- 2-Benzyl-2H-tetrazole-5-carboxylic acid (CAS 55408-13-4)
- N-[(1S,2S)-2-Amino-1,2-diphenylethyl]-2,4,6-trisisopropylbenzenesulfonamide (CAS 247923-41-7)
- [4-(difluoromethyl)-1-methoxycyclohexyl]methanamine (CAS 1955554-03-6)
- (S)-1-(3-chloro-4-(trifluoromethoxy)phenyl)butan-1-amine (CAS 1213524-26-5)
- 2-(Pyrazin-2-yl)-N-(4-(trifluoromethoxy)phenyl)thiazole-4-carboxamide (CAS 1234808-01-5)
- Posaconazole Impurity 16(S,R,S,S) (CAS 213381-02-3)
- cis-1-Methyl-7-oxo-3-aza-bicyclo[3.2.0]heptane-3-carboxylic acid tert-butyl ester (CAS 1263378-91-1)
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