1-Methyl-1H-1,2,4-triazol-5(4H)-one CAS 4114-20-9

Purity 97%+In StockPharmaceutical Standards
CAS No.4114-20-9
Molecular FormulaC3H5N3O
Molecular Weight99.09 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

1-Methyl-1H-1,2,4-triazol-5(4H)-one CAS 4114-20-9 chemical structure

Description

Owing to an amide group, a hydroxyl group, an ether linkage, 1-Methyl-1H-1,2,4-triazol-5(4H)-one is typically white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 99.09 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).

1-Methyl-1H-1,2,4-triazol-5(4H)-one (CAS 4114-20-9), molecular formula C3H5N3O and molecular weight 99.09 g/mol, is a CATO reference standard with documented purity and traceability.

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 FormulaC3H5N3O
Molecular Weight99.09 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 Atoms3

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