5-Chloropyrazin-2(1H)-one CAS 89180-45-0

Purity 97%+In StockPharmaceutical Standards
CAS No.89180-45-0
Molecular FormulaC4H3ClN2O
Molecular Weight130.53 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

5-Chloropyrazin-2(1H)-one CAS 89180-45-0 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.

5-Chloropyrazin-2(1H)-one (CAS 89180-45-0), molecular formula C4H3ClN2O and molecular weight 130.53 g/mol, is a CATO reference standard with documented purity and traceability.

5-Chloropyrazin-2(1H)-one (C4H3ClN2O) contains an amide group, a hydroxyl group, an ether linkage, chlorine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.

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 FormulaC4H3ClN2O
Molecular Weight130.53 g/mol
Purity97%+
StorageStore at 2-8°C, protect from light, keep tightly closed to prevent evaporation
Solubility (reference)Soluble in DMSO, DMF, methanol
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.)1982
Halogen ContentCl-containing
Nitrogen Atoms2

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Why CATO?