2-Cyanobut-2-enoic acid CAS 759-72-8

Purity 97%+In StockPharmaceutical Standards
CAS No.759-72-8
Molecular FormulaC5H5NO2
Molecular Weight111.10 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

2-Cyanobut-2-enoic acid CAS 759-72-8 chemical structure

Description

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.

2-Cyanobut-2-enoic acid (CAS 759-72-8), molecular formula C5H5NO2 and molecular weight 111.10 g/mol, is a CATO reference standard with documented purity and traceability.

2-Cyanobut-2-enoic acid (C5H5NO2) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).

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 FormulaC5H5NO2
Molecular Weight111.10 g/mol
Purity97%+
StorageStore at 2-8°C, protect from light
Solubility (reference)Soluble in methanol, acetonitrile, DMSO, water (slightly soluble)
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)4.0
UV AbsorptionUV-absorbing
CAS Registry Year (est.)1957
Nitrogen Atoms1

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