(E)-Methyl 2-(3-hydroxy-5-oxo-4-(p-tolyl)furan-2(5H)-ylidene)-2-(p-tolyl)acetate CAS 37542-24-8

Purity 97%+In StockPharmaceutical Standards
CAS No.37542-24-8
Molecular FormulaC21H18O5
Molecular Weight350.36 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

(E)-Methyl 2-(3-hydroxy-5-oxo-4-(p-tolyl)furan-2(5H)-ylidene)-2-(p-tolyl)acetate CAS 37542-24-8 chemical structure

Description

Compared with other compounds in its class, the molecular weight of 350.36 g/mol gives (E)-Methyl 2-(3-hydroxy-5-oxo-4-(p-tolyl)furan-2(5H)-ylidene)-2-(p-tolyl)acetate distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

(E)-Methyl 2-(3-hydroxy-5-oxo-4-(p-tolyl)furan-2(5H)-ylidene)-2-(p-tolyl)acetate (CAS 37542-24-8) is a high-purity analytical reference standard with the molecular formula C21H18O5 and a molecular weight of 350.36 g/mol.

Structurally, (E)-Methyl 2-(3-hydroxy-5-oxo-4-(p-tolyl)furan-2(5H)-ylidene)-2-(p-tolyl)acetate (C21H18O5) contains a flavonoid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 13.0, corresponding to approximately 13 ring(s) or double-bond equivalent(s). With a molecular weight of 350.36 g/mol, it falls into the moderately-high-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.

As a certified reference material (CRM), (E)-Methyl 2-(3-hydroxy-5-oxo-4-(p-tolyl)furan-2(5H)-ylidene)-2-(p-tolyl)acetate 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 FormulaC21H18O5
Molecular Weight350.36 g/mol
AppearancePale yellow to yellow crystalline powder
Purity97%+
StorageStore at 2-8°C, protect from light, keep sealed and dry
Solubility (reference)Soluble in methanol, acetonitrile, DMSO, water (slightly soluble)
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)13.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1967

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