4-Methyl-3(2H)-pyridazinone CAS 33471-40-8

Purity 97%+In StockPharmaceutical Standards
CAS No.33471-40-8
Molecular FormulaC5H6N2O
Molecular Weight110.11 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

4-Methyl-3(2H)-pyridazinone CAS 33471-40-8 chemical structure

Description

4-Methyl-3(2H)-pyridazinone (CAS 33471-40-8), molecular formula C5H6N2O and molecular weight 110.11 g/mol, is a CATO reference standard with documented purity and traceability.

Structurally, 4-Methyl-3(2H)-pyridazinone (C5H6N2O) contains an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 110.11 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).

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

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 FormulaC5H6N2O
Molecular Weight110.11 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)4.0
UV AbsorptionUV-absorbing
CAS Registry Year (est.)1966
Nitrogen Atoms2

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