3-Ethyl-7-methyl-[1,2,4]triazolo[4,3-a]pyridine CAS 4919-20-4

Purity 97%+In StockPharmaceutical Standards
CAS No.4919-20-4
Molecular FormulaC9H11N3
Molecular Weight161.20 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

3-Ethyl-7-methyl-[1,2,4]triazolo[4,3-a]pyridine CAS 4919-20-4 chemical structure

Description

Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 3-Ethyl-7-methyl-[1,2,4]triazolo[4,3-a]pyridine.

3-Ethyl-7-methyl-[1,2,4]triazolo[4,3-a]pyridine (CAS 4919-20-4) is a high-purity analytical reference standard with the molecular formula C9H11N3 and a molecular weight of 161.20 g/mol.

The molecular framework of 3-Ethyl-7-methyl-[1,2,4]triazolo[4,3-a]pyridine (C9H11N3) is characterized by a nitrogen-containing heterocyclic scaffold, a nitrile group. 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 aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

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 FormulaC9H11N3
Molecular Weight161.20 g/mol
AppearanceOff-white to pale yellow crystalline powder. (faint amine-like odor)
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)6.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1958
Nitrogen Atoms3

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