6-acetyl-4-methyl-2H-benzo[b][1,4]oxazin-3(4H)-one CAS 26518-72-9
| CAS No. | 26518-72-9 |
| Molecular Formula | C11H11NO3 |
| Molecular Weight | 205.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
6-acetyl-4-methyl-2H-benzo[b][1,4]oxazin-3(4H)-one (CAS 26518-72-9), molecular formula C11H11NO3 and molecular weight 205.21 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C11H11NO3, 6-acetyl-4-methyl-2H-benzo[b][1,4]oxazin-3(4H)-one contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 205.21 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.
As a certified reference material (CRM), 6-acetyl-4-methyl-2H-benzo[b][1,4]oxazin-3(4H)-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 | C11H11NO3 |
| Molecular Weight | 205.21 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1964 |
| Nitrogen Atoms | 1 |
Recommended Standards
- 6-Acetyl-2-methyl-2H-benzo[b][1,4]oxazin-3(4H)-one (CAS 293741-61-4)
- 6-Acetyl-8-methyl-2H-benzo[b][1,4]oxazin-3(4H)-one (CAS 943994-36-3)
- 6,8-Dimethoxyquinoxalin-5-amine (CAS 73855-41-1)
- 6-Amino-1,4-dimethyl-1,4-dihydroquinoxaline-2,3-dione (CAS 76097-86-4)
- 8,8'-Bis(((2-chloro-5-(trifluoromethyl)phenyl)imino)methyl)-5,5'-diisopropyl-3,3'-dimethyl-[2,2'-binaphthalene]-1,1',6,6',7,7'-hexaol (CAS 7355-32-0)
- 4-Chloro-6-cyclopropylpyrimidine (CAS 7038-76-8)
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- Ethyl (Z)-3-amino-3-(2-(1-methyl-1H-pyrrole-2-carbonyl)hydrazono)propanoate (CAS 338395-60-1)
- 1-[2-(1,3-Dioxolan-2-yl)ethyl]-4-nitro-1h-pyrazole (CAS 1006570-90-6)
- 3-((1-Methyl-4-nitro-1H-pyrazol-3-yl)oxy)benzoic acid (CAS 1429419-12-4)
- H-β-tBu-D-Ala-OH (CAS 88319-43-1)
- 4-(Octyloxy)phenylisocyanate (CAS 32223-72-6)
- N-(3,4-dimethylphenyl)-1-(2-(ethylthio)-1-methyl-1H-imidazol-5-yl)methanimine (CAS 303986-84-7)
- Semaglutide Impurity 6 (CAS 62-57-7)
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