Methyl 6,8-dichloro-2-oxo-2H-chromene-3-carboxylate CAS 947264-93-9
| CAS No. | 947264-93-9 |
| Molecular Formula | C11H6Cl2O4 |
| Molecular Weight | 273.07 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Methyl 6,8-dichloro-2-oxo-2H-chromene-3-carboxylate.
CATO supplies Methyl 6,8-dichloro-2-oxo-2H-chromene-3-carboxylate (CAS 947264-93-9), a certified reference material (molecular formula C11H6Cl2O4, MW 273.07 g/mol) for analytical method development and quality control.
Structurally, Methyl 6,8-dichloro-2-oxo-2H-chromene-3-carboxylate (C11H6Cl2O4) contains a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, 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 273.07 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C11H6Cl2O4 |
| Molecular Weight | 273.07 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Cl-containing |
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Recommended Standards
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- Methyl 1-[(4-methoxyphenyl)methyl]-2,6-dioxo-1,2,3,6-tetrahydropyrimidine-4-carboxylate (CAS 1597781-22-0)
- 2-(((Tetrahydrofuran-2-yl)methoxy)carbonyl)benzoic acid (CAS 35395-64-3)
- 4-Methylpyrrolidin-3-one hydrochloride (CAS 1636874-93-5)
- tert-Butyl 7-(2-methoxy-2-oxoethyl)-3,4-dihydro-1,8-naphthyridine-1(2H)-carboxylate (CAS 925889-81-2)
- 2-(2-Bromophenyl)oxazole-4-carbaldehyde (CAS 885274-34-0)
- [5-(4-Methanesulfonylphenyl)-2-methyl-1-[3-(trifluoromethyl)phenyl]-1H-pyrrol-3-yl]methyl 4-methylbenzoate (CAS 338749-83-0)
- Ribofuranose (CAS 15761-67-8)
- trans-4-Pentylcyclohexanecarboxylic Acid (CAS 38289-29-1)
- C-Peptide 1 (rat) (CAS 41475-27-8)
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