Methyl 6-chloro-2-oxo-2H-chromene-3-carboxylate CAS 91058-98-9
| CAS No. | 91058-98-9 |
| Molecular Formula | C11H7ClO4 |
| Molecular Weight | 238.62 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Methyl 6-chloro-2-oxo-2H-chromene-3-carboxylate (CAS 91058-98-9), molecular formula C11H7ClO4 and molecular weight 238.62 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, Methyl 6-chloro-2-oxo-2H-chromene-3-carboxylate is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 238.62 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
As a certified reference material (CRM), Methyl 6-chloro-2-oxo-2H-chromene-3-carboxylate meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C11H7ClO4 |
| Molecular Weight | 238.62 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| 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.) | 1983 |
| Halogen Content | Cl-containing |
Related Methyl Standards
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- 5-Chloro-2-(trifluoromethylthio) nicotinonitrile (CAS 1204234-33-2)
- 4-Chloro-7-methoxy-2-oxo-2H-chromene-3-carbaldehyde (CAS 122978-33-0)
- 6-Chloro-3-methyl-4-oxo-4H-chromene-2-carboxylic Acid (CAS 1239779-74-8)
- 4-(3-Chloro-2,4-difluorophenyl)-1H-pyrrole-3-carbonitrile (CAS 124185-27-9)
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Recommended Standards
- 8-(Chloromethyl)-6H-[1,3]dioxolo[4,5-g]chromen-6-one (CAS 484000-52-4)
- Methyl 6-chloro-4-oxo-4h-chromene-2-carboxylate (CAS 27455-31-8)
- 6-Chloro-7-methyl-4-oxo-4h-chromene-2-carboxylic acid (CAS 262590-94-3)
- Methyl 8-chloro-2-oxo-2H-chromene-3-carboxylate (CAS 845866-37-7)
- (((9H-fluoren-9-yl)methoxy)carbonyl)serine (CAS 136083-72-2)
- 3-(3-Methoxyisoxazol-5-yl)propanoic acid (CAS 52898-06-3)
- (5-((4-Chlorophenyl)sulfonyl)-1-methyl-3-(trifluoromethyl)-1H-pyrazol-4-yl)methyl 4-chlorobenzoate (CAS 318469-38-4)
- 2-[(5-Bromo-2-pyridinyl)oxy]acetic acid (CAS 79674-66-1)
- 4,6-Dicyclopropylpyrimidin-5-amine (CAS 2387291-26-9)
- 2-(2,3-Dichlorophenyl)-6-methoxy-3-nitropyridine (CAS 1361674-44-3)
- (η<SUP>5</SUP>-2,4-cyclopentadien-1-yl)[(1,2,3-η)-1-phenyl-2-propenyl]-palladium (CAS 105333-10-6)
- Pyronaridine Impurity 13 (CAS 1596337-68-6)
- 4-Chloro-5-(((3,4-dichlorobenzyl)thio)methyl)isoxazol-3(2H)-one (CAS 89661-05-2)
- Semaglutide Impurity 180 (CAS CATO-C4X-2226180)
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