3,4-Dihydro-2H-benzo[e][1,3]oxazine CAS 66955-51-9
| CAS No. | 66955-51-9 |
| Molecular Formula | C8H9NO |
| Molecular Weight | 135.16 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.
CATO supplies 3,4-Dihydro-2H-benzo[e][1,3]oxazine (CAS 66955-51-9), a certified reference material (molecular formula C8H9NO, MW 135.16 g/mol) for analytical method development and quality control.
Structurally, 3,4-Dihydro-2H-benzo[e][1,3]oxazine (C8H9NO) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 135.16 g/mol, it falls into the low-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C8H9NO |
| Molecular Weight | 135.16 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1976 |
| Nitrogen Atoms | 1 |
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Recommended Standards
- 3,4-dihydro-2H-benzo[b][1,4]oxazine (CAS 5735-53-5)
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- 3,3-Difluorocyclohexan-1-amine (CAS 921753-34-6)
- 3,4-Dihydro-2H-pyrano[2,3-c]pyridine (CAS 84957-39-1)
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- 2-(Isopropylamino)-4-(3-methyl-1h-pyrazol-1-yl)butanamide (CAS 1340151-11-2)
- L-Ornithine L-Aspartate Impurity 3 (CAS 7327-72-2)
- 61379-95-1 4-Piperidinecarboxylic acid, 4-(phenylamino)-, ethyl ester DTXSID90485923 (CAS 61379-95-1)
- Ilaprazole Impurity 180 (CAS 1564928-02-4(free base))
- 2-Bromo-5-chloronicotinaldehyde (CAS 1227605-52-8)
- Methyl 5-bromo-2-methyl-2H-indazole-4-carboxylate (CAS 1037840-80-4)
- D-Pro31-Tirzepatide (CAS CATO-CPTD788905)
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