3-Ethyl-7-fluoro-3,4-dihydroquinoxalin-2(1H)-one CAS 878289-65-7

Purity 97%+In StockPharmaceutical Standards
CAS No.878289-65-7
Molecular FormulaC10H11FN2O
Molecular Weight194.21 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

3-Ethyl-7-fluoro-3,4-dihydroquinoxalin-2(1H)-one CAS 878289-65-7 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 3-Ethyl-7-fluoro-3,4-dihydroquinoxalin-2(1H)-one.

3-Ethyl-7-fluoro-3,4-dihydroquinoxalin-2(1H)-one (CAS 878289-65-7) is a high-purity analytical reference standard with the molecular formula C10H11FN2O and a molecular weight of 194.21 g/mol.

Structurally, 3-Ethyl-7-fluoro-3,4-dihydroquinoxalin-2(1H)-one (C10H11FN2O) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 194.21 g/mol, it falls into the medium-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.

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 FormulaC10H11FN2O
Molecular Weight194.21 g/mol
AppearanceOff-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor)
Purity97%+
StorageStore at 2-8°C, protect from light, keep tightly closed to prevent evaporation
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)6.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1987
Halogen ContentF-containing
Nitrogen Atoms2

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