4,5-Dichloro-2-(2,3,6-trichlorobenzyl)pyridazin-3(2H)-one CAS 303033-93-4

Purity 97%+In StockPharmaceutical Standards
CAS No.303033-93-4
Molecular FormulaC11H5Cl5N2O
Molecular Weight358.44 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

4,5-Dichloro-2-(2,3,6-trichlorobenzyl)pyridazin-3(2H)-one CAS 303033-93-4 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.

4,5-Dichloro-2-(2,3,6-trichlorobenzyl)pyridazin-3(2H)-one (CAS 303033-93-4), molecular formula C11H5Cl5N2O and molecular weight 358.44 g/mol, is a CATO reference standard with documented purity and traceability.

The molecular framework of 4,5-Dichloro-2-(2,3,6-trichlorobenzyl)pyridazin-3(2H)-one (C11H5Cl5N2O) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).

As a certified reference material (CRM), 4,5-Dichloro-2-(2,3,6-trichlorobenzyl)pyridazin-3(2H)-one meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

Physical & Chemical Properties

Molecular FormulaC11H5Cl5N2O
Molecular Weight358.44 g/mol
AppearancePale yellow to yellow crystalline powder. (slight halide-like odor, low volatility)
Purity97%+
StorageStore at 2-8°C, protect from light
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)8.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)2025
Halogen ContentCl-containing
Nitrogen Atoms2

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