1-Methylpyrazole-4-carbonitrile CAS 66121-71-9

Purity 97%+In StockPharmaceutical Standards
CAS No.66121-71-9
Molecular FormulaC5H5N3
Molecular Weight107.11 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

1-Methylpyrazole-4-carbonitrile CAS 66121-71-9 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.

1-Methylpyrazole-4-carbonitrile (CAS 66121-71-9), molecular formula C5H5N3 and molecular weight 107.11 g/mol, is a CATO reference standard with documented purity and traceability.

Structurally, 1-Methylpyrazole-4-carbonitrile (C5H5N3) 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 107.11 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).

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 FormulaC5H5N3
Molecular Weight107.11 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.)1975
Nitrogen Atoms3

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Why CATO?