8-Methoxy-3,4-dihydro-2H-benzo[b][1,4]dioxepine-7-carbaldehyde CAS 919016-99-2
| CAS No. | 919016-99-2 |
| Molecular Formula | C11H12O4 |
| Molecular Weight | 208.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C11H12O4, 8-Methoxy-3,4-dihydro-2H-benzo[b][1,4]dioxepine-7-carbaldehyde contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 208.21 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
CATO supplies 8-Methoxy-3,4-dihydro-2H-benzo[b][1,4]dioxepine-7-carbaldehyde (CAS 919016-99-2), a certified reference material (molecular formula C11H12O4, MW 208.21 g/mol) for analytical method development and quality control.
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.
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 | C11H12O4 |
| Molecular Weight | 208.21 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
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Recommended Standards
- 7-Methoxychromane-2-carboxylic Acid (CAS 944899-78-9)
- 9-Methoxy-3,4-dihydro-2H-benzo[b][1,4]dioxepine-7-carbaldehyde (CAS 951796-54-6)
- 7-Methoxychroman-3-carboxylic acid (CAS 3187-51-7)
- 9-Oxo-9H-fluorene-1-carbaldehyde (CAS 5385-56-8)
- 2-Acetamido-N-(tert-butyl)thiazole-4-carboxamide (CAS 1197710-93-2)
- N-[(2H-1,3-Benzodioxol-5-yl)methyl]-2-[4-(5-chloro-6-oxo-1-phenyl-1,6-dihydropyridazin-4-yl)piperazin-1-yl]acetamide (CAS 924249-06-9)
- 1-methyl-1H-pyrrole-2-sulfonyl fluoride (CAS 1909312-64-6)
- 4,6-Dichloro-N-methyl-1,3,5-triazin-2-amine (CAS 27282-80-0)
- 4-Allyl-2-chloro-1-ethoxybenzene (CAS 1378595-33-5)
- 2-Amino-6-methyl-N-phenyl-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxamide (CAS 306752-53-4)
- Diethylstilbestrol Dimethyl Ether (CAS 7773-34-4)
- 4-Cyano-2-methyl-5-(trifluoromethoxy)benzene-1-sulfonyl chloride (CAS 1806280-61-4)
- Tert-butyl 3-(2-ethoxy-2-oxoethyl)-4-oxopyrrolidine-1-carboxylate (CAS 2109939-80-0)
- Semaglutide Impurity 133 (CAS CATO-C4X-2226133)
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