3-Methyl-4-(3-nitrophenyl)isoxazolo[3,4-d]pyridazin-7(6H)-one CAS 189306-89-6

Purity 97%+In StockPharmaceutical Standards
CAS No.189306-89-6
Molecular FormulaC12H8N4O4
Molecular Weight272.22 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

3-Methyl-4-(3-nitrophenyl)isoxazolo[3,4-d]pyridazin-7(6H)-one CAS 189306-89-6 chemical structure

Description

The occurrence of 3-Methyl-4-(3-nitrophenyl)isoxazolo[3,4-d]pyridazin-7(6H)-one is closely related to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

CATO supplies 3-Methyl-4-(3-nitrophenyl)isoxazolo[3,4-d]pyridazin-7(6H)-one (CAS 189306-89-6), a certified reference material (molecular formula C12H8N4O4, MW 272.22 g/mol) for analytical method development and quality control.

The molecular framework of 3-Methyl-4-(3-nitrophenyl)isoxazolo[3,4-d]pyridazin-7(6H)-one (C12H8N4O4) is characterized by an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).

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.

As a certified reference material (CRM), 3-Methyl-4-(3-nitrophenyl)isoxazolo[3,4-d]pyridazin-7(6H)-one 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 FormulaC12H8N4O4
Molecular Weight272.22 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 DMSO, DMF, methanol
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)11.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)2011
Nitrogen Atoms4

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