3-chloro-5-methylpyridazine CAS 89283-31-8

Purity 97%+In StockPharmaceutical Standards
CAS No.89283-31-8
Molecular FormulaC5H5ClN2
Molecular Weight128.56 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

3-chloro-5-methylpyridazine CAS 89283-31-8 chemical structure

Description

3-chloro-5-methylpyridazine (CAS 89283-31-8), molecular formula C5H5ClN2 and molecular weight 128.56 g/mol, is a CATO reference standard with documented purity and traceability.

The molecular framework of 3-chloro-5-methylpyridazine (C5H5ClN2) is characterized by a nitrile group, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

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.

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 FormulaC5H5ClN2
Molecular Weight128.56 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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