5-Ethyl-4-methyl-4h-1,2,4-triazole-3-thiol CAS 4418-57-9

Purity 97%+In StockPharmaceutical Standards
CAS No.4418-57-9
Molecular FormulaC5H9N3S
Molecular Weight143.21 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

5-Ethyl-4-methyl-4h-1,2,4-triazole-3-thiol CAS 4418-57-9 chemical structure

Description

Structurally, 5-Ethyl-4-methyl-4h-1,2,4-triazole-3-thiol (C5H9N3S) contains a nitrile group, sulfur-containing functionality. The molecule exhibits a degree of unsaturation (DBE) of 3.0, corresponding to approximately 3 ring(s) or double-bond equivalent(s). With a molecular weight of 143.21 g/mol, it falls into the low-molecular-weight range. 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).

CATO supplies 5-Ethyl-4-methyl-4h-1,2,4-triazole-3-thiol (CAS 4418-57-9), a certified reference material (molecular formula C5H9N3S, MW 143.21 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.

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 FormulaC5H9N3S
Molecular Weight143.21 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
Sulfur Atoms1

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