5-Methoxy-7-methyl-4H-chromen-4-one CAS 78274-05-2
| CAS No. | 78274-05-2 |
| Molecular Formula | C11H10O3 |
| Molecular Weight | 190.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 5-Methoxy-7-methyl-4H-chromen-4-one (CAS 78274-05-2), a certified reference material (molecular formula C11H10O3, MW 190.20 g/mol) for analytical method development and quality control.
Structurally, 5-Methoxy-7-methyl-4H-chromen-4-one (C11H10O3) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 190.20 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.
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 | C11H10O3 |
| Molecular Weight | 190.20 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.) | 1979 |
Related Methoxy Standards
- 5-Methoxy-7-methyl-1H-indazole-3-carbaldehyde (CAS 1000340-55-5)
- 1-(4-Methoxy-1H-pyrrolo[2,3-b]pyridin-3-yl)ethanone (CAS 1011711-59-3)
- 6-Methoxy-3-methyl-benzofuran-2-carbaldehyde (CAS 10410-28-3)
- 4-Methoxy-1H,1'H-[2,2'-bipyrrole]-5-carbaldehyde (CAS 10476-41-2)
- 7-Methoxy-2-methylquinazolin-4(3H)-one (CAS 105493-90-1)
- 6-Methoxy-3-methylquinoxalin-2(1H)-one (CAS 108833-49-4)
- 2-Methoxy-N-(prop-2-yn-1-yl)nicotinamide (CAS 1090881-56-3)
- 4-Methoxy-6-methyl-2-(1H-pyrazol-1-yl)pyrimidine (CAS 114833-96-4)
Recommended Standards
- 5-Methoxy-3-methylbenzofuran-2-carbaldehyde (CAS 33038-25-4)
- 5-Methoxyquinazoline-2,4-diamine (CAS 27018-21-9)
- 5-Methoxy-2-methylquinazolin-4(1H)-one (CAS 827031-24-3)
- 5-methyl-3-phenylimidazolidine-2,4-dione (CAS 33558-00-8)
- N-Octane-d18 (CAS 17252-77-6)
- BCN-PEG4-HyNic (CAS 1507370-54-8)
- Ethyl 3-acetyl-2-methylbenzoate (CAS 898747-04-1)
- 2-(4-Amino-6-(difluoromethyl)-2-fluoropyridin-3-yl)acetic acid (CAS 1805056-18-1)
- Omeprazole N1-Methyl 6-Methoxy Thiol Impurity (CAS 1526768-06-8)
- Lidocaine Hydrochloride EP Impurity G(HCl) (CAS 35891-87-3)
- 2-Chloro-6-((3-chlorobenzyl)oxy)pyrazine (CAS 479685-04-6)
- Ethyl 5-(((1-formylnaphthalen-2-yl)oxy)methyl)-4,5-dihydroisoxazole-3-carboxylate (CAS 321432-25-1)
- 4-Chloro-8-cyclopropylpteridin-7(8H)-one (CAS 1710202-22-4)
- Glucagon receptor antagonist I (CAS 438618-32-7)
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