5-ethynyl-1H-triazole CAS 119720-87-5

Purity 97%+In StockPharmaceutical Standards
CAS No.119720-87-5
Molecular FormulaC4H3N3
Molecular Weight93.09 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

5-ethynyl-1H-triazole CAS 119720-87-5 chemical structure

Description

CATO supplies 5-ethynyl-1H-triazole (CAS 119720-87-5), a certified reference material (molecular formula C4H3N3, MW 93.09 g/mol) for analytical method development and quality control.

Structurally, 5-ethynyl-1H-triazole (C4H3N3) contains a nitrile group. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 93.09 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).

Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.

As a certified reference material (CRM), 5-ethynyl-1H-triazole 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 FormulaC4H3N3
Molecular Weight93.09 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)5.0
UV AbsorptionUV-absorbing
CAS Registry Year (est.)1991
Nitrogen Atoms3

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