4-Chloro-2-methyl-2H-benzo[b]pyridazino[4,3-e][1,4]oxazin-3(5H)-one CAS 66613-93-2
| CAS No. | 66613-93-2 |
| Molecular Formula | C11H8ClN3O2 |
| Molecular Weight | 249.65 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C11H8ClN3O2, 4-Chloro-2-methyl-2H-benzo[b]pyridazino[4,3-e][1,4]oxazin-3(5H)-one contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 249.65 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO supplies 4-Chloro-2-methyl-2H-benzo[b]pyridazino[4,3-e][1,4]oxazin-3(5H)-one (CAS 66613-93-2), a certified reference material (molecular formula C11H8ClN3O2, MW 249.65 g/mol) for analytical method development and quality control.
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-2H-benzo[b]pyridazino[4,3-e][1,4]oxazin-3(5H)-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 | C11H8ClN3O2 |
| Molecular Weight | 249.65 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1976 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Chloro Standards
- 3-Chloro-6-(4-methyl-3-nitrophenyl)pyridazine (CAS 1030584-84-9)
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- 2-Chloro-5-(pyrimidin-2-ylamino)benzoic acid (CAS 1184378-11-7)
- 5-Chloro-2-phenoxynicotinic acid (CAS 1189749-38-9)
- 2-Chloro-6-methyl-5-nitro-3,3'-bipyridine (CAS 1214352-55-2)
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Recommended Standards
- 4-Chloro-1-nitro-2-phenoxybenzene (CAS 56966-63-3)
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- 5-(4-chlorophenoxy)pyridine-2-carboxylic acid (CAS 72133-24-5)
- 2-(3-Hydroxypropyl)-4-methoxyphenol (CAS 33538-76-0)
- 1-(Cyclopropylmethyl)-4-ethynyl-1H-pyrazole (CAS 2098147-97-6)
- (E)-6-Amino-5-(benzylideneamino)pyrimidine-2,4-diol (CAS 61885-37-8)
- {[(1S,2S)-2-Amino-1,2-diphenylethyl](4-toluenesulfonyl)amido}(p-cymene)(pyridine)ruthenium(II) tetrafluoroborate (CAS 1192483-28-5)
- 1-(Fluoromethyl)-2-oxabicyclo[2.2.1]heptane-4-carboxylic acid (CAS 2460755-32-0)
- 9,9-Bis(3,4-dihydroxyphenyl)fluorene (CAS 351521-78-3)
- 9-Oxo-6,7,8,9-tetrahydro-5H-benzo[7]annulen-2-yl pivalate (CAS 87451-94-3)
- 3-(Perfluorophenyl)benzo[c]isoxazole (CAS 14186-66-4)
- 1-Methyl-3-phenylpiperidine-4-carboxylic acid (CAS 658712-69-7)
- Cycloaspeptide A (CAS 109171-13-3)
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