6-(1,3-Dimethyl-1H-pyrazol-4-yl)-3-phenylisoxazolo[5,4-b]pyridine-4-carboxylic acid CAS 1171701-49-7

Purity 97%+In StockPharmaceutical Standards
CAS No.1171701-49-7
Molecular FormulaC18H14N4O3
Molecular Weight334.33 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

6-(1,3-Dimethyl-1H-pyrazol-4-yl)-3-phenylisoxazolo[5,4-b]pyridine-4-carboxylic acid CAS 1171701-49-7 chemical structure

Description

The occurrence of 6-(1,3-Dimethyl-1H-pyrazol-4-yl)-3-phenylisoxazolo[5,4-b]pyridine-4-carboxylic acid is closely related to a steroid core, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

6-(1,3-Dimethyl-1H-pyrazol-4-yl)-3-phenylisoxazolo[5,4-b]pyridine-4-carboxylic acid (CAS 1171701-49-7) is a high-purity analytical reference standard with the molecular formula C18H14N4O3 and a molecular weight of 334.33 g/mol.

Based on its molecular formula C18H14N4O3, 6-(1,3-Dimethyl-1H-pyrazol-4-yl)-3-phenylisoxazolo[5,4-b]pyridine-4-carboxylic acid contains a steroid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 334.33 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

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), 6-(1,3-Dimethyl-1H-pyrazol-4-yl)-3-phenylisoxazolo[5,4-b]pyridine-4-carboxylic acid 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 FormulaC18H14N4O3
Molecular Weight334.33 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)14.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1989
Nitrogen Atoms4

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