3-Ethoxy-5-methyl-1H-pyrazole CAS 5203-83-8

Purity 97%+In StockPharmaceutical Standards
CAS No.5203-83-8
Molecular FormulaC6H10N2O
Molecular Weight126.16 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

3-Ethoxy-5-methyl-1H-pyrazole CAS 5203-83-8 chemical structure

Description

3-Ethoxy-5-methyl-1H-pyrazole (CAS 5203-83-8) is a high-purity analytical reference standard with the molecular formula C6H10N2O and a molecular weight of 126.16 g/mol.

Owing to an amide group, a hydroxyl group, an ether linkage, 3-Ethoxy-5-methyl-1H-pyrazole is typically white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 126.16 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.

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 FormulaC6H10N2O
Molecular Weight126.16 g/mol
Purity97%+
StorageStore at 2-8°C, protect from light
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityLight-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)3.0
UV AbsorptionUV-absorbing
CAS Registry Year (est.)1958
Nitrogen Atoms2

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