Ethyl 5-hydroxy-4-methyl-2-oxo-2H-chromene-3-carboxylate CAS 137565-36-7
| CAS No. | 137565-36-7 |
| Molecular Formula | C13H12O5 |
| Molecular Weight | 248.23 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures Ethyl 5-hydroxy-4-methyl-2-oxo-2H-chromene-3-carboxylate 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.
Ethyl 5-hydroxy-4-methyl-2-oxo-2H-chromene-3-carboxylate (CAS 137565-36-7), molecular formula C13H12O5 and molecular weight 248.23 g/mol, is a CATO reference standard with documented purity and traceability.
Ethyl 5-hydroxy-4-methyl-2-oxo-2H-chromene-3-carboxylate (C13H12O5) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.
Physical & Chemical Properties
| Molecular Formula | C13H12O5 |
| Molecular Weight | 248.23 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, acetonitrile, DMSO, water (slightly soluble) |
| 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.) | 1996 |
Related Ethyl Standards
- 7-Hydroxy-4-oxo-8-propyl-4H-chromene-2-carboxylic acid (CAS 105212-09-7)
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- Ethyl 7-hydroxy-8-methyl-2-oxo-2H-chromene-3-carboxylate (CAS 133073-68-4)
- 1-(4-Hydroxy-5-methoxy-2-nitrophenyl)cyclobutane-1-carbonitrile (CAS 1527503-23-6)
- 2-(5-Hydroxy-4,7-dimethyl-2-oxo-2h-chromen-3-yl)acetic acid (CAS 873414-53-0)
- 2-(7-Hydroxy-4,8-dimethyl-2-oxo-2h-chromen-3-yl)acetic acid (CAS 500203-88-3)
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Recommended Standards
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- 5-Butyl-1,2,3-thiadiazole-4-carboxylic acid (CAS 1708437-34-6)
- Methyl 2-(4-(pyrrolidin-1-ylmethyl)phenyl)acetate (CAS 878139-91-4)
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