7-Methoxy-4-oxo-4H-chromene-3-carbaldehyde CAS 42059-56-3
| CAS No. | 42059-56-3 |
| Molecular Formula | C11H8O4 |
| Molecular Weight | 204.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
7-Methoxy-4-oxo-4H-chromene-3-carbaldehyde (CAS 42059-56-3), molecular formula C11H8O4 and molecular weight 204.18 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 7-Methoxy-4-oxo-4H-chromene-3-carbaldehyde (C11H8O4) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 8.0, corresponding to approximately 8 ring(s) or double-bond equivalent(s). With a molecular weight of 204.18 g/mol, it falls into the medium-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 manufactures 7-Methoxy-4-oxo-4H-chromene-3-carbaldehyde under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C11H8O4 |
| Molecular Weight | 204.18 g/mol |
| Appearance | Pale yellow to 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1969 |
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Recommended Standards
- 7-Methoxy-3-nitroquinoline (CAS 39977-95-2)
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- 7-Methoxy-2-oxo-2H-chromene-8-carbaldehyde (CAS 6724-42-1)
- 7-Methoxy-8-nitroquinoline (CAS 83010-83-7)
- 1-(Propan-2-yl)-1h-pyrazole-4-sulfonyl chloride (CAS 1177336-51-4)
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- Mast Cell Degranulating (MCD) Peptide (CAS 32908-73-9)
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