3-(2-Chloro-6-fluorophenyl)-5-methyl-N-(3-oxo-2,3-dihydro-1,2,4-thiadiazol-5-yl)isoxazole-4-carboxamide CAS 303998-79-0

Purity 97%+In StockPharmaceutical Standards
CAS No.303998-79-0
Molecular FormulaC13H8ClFN4O3S
Molecular Weight354.74 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

3-(2-Chloro-6-fluorophenyl)-5-methyl-N-(3-oxo-2,3-dihydro-1,2,4-thiadiazol-5-yl)isoxazole-4-carboxamide CAS 303998-79-0 chemical structure

Description

3-(2-Chloro-6-fluorophenyl)-5-methyl-N-(3-oxo-2,3-dihydro-1,2,4-thiadiazol-5-yl)isoxazole-4-carboxamide (C13H8ClFN4O3S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

CATO supplies 3-(2-Chloro-6-fluorophenyl)-5-methyl-N-(3-oxo-2,3-dihydro-1,2,4-thiadiazol-5-yl)isoxazole-4-carboxamide (CAS 303998-79-0), a certified reference material (molecular formula C13H8ClFN4O3S, MW 354.74 g/mol) for analytical method development and quality control.

This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.

CATO manufactures 3-(2-Chloro-6-fluorophenyl)-5-methyl-N-(3-oxo-2,3-dihydro-1,2,4-thiadiazol-5-yl)isoxazole-4-carboxamide 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.

Physical & Chemical Properties

Molecular FormulaC13H8ClFN4O3S
Molecular Weight354.74 g/mol
Purity97%+
StorageStore at 2-8°C, protect from light, keep sealed and dry
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityMay 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)11.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)2025
Halogen ContentF/Cl-containing
Nitrogen Atoms4
Sulfur Atoms1

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