5-Chloro-4-((4-chlorophenyl)thio)-2-(p-tolyl)pyridazin-3(2H)-one CAS 551921-36-9

Purity 97%+In StockPharmaceutical Standards
CAS No.551921-36-9
Molecular FormulaC17H12Cl2N2OS
Molecular Weight363.26 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

5-Chloro-4-((4-chlorophenyl)thio)-2-(p-tolyl)pyridazin-3(2H)-one CAS 551921-36-9 chemical structure

Description

The occurrence of 5-Chloro-4-((4-chlorophenyl)thio)-2-(p-tolyl)pyridazin-3(2H)-one is closely related to a steroid core, an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

5-Chloro-4-((4-chlorophenyl)thio)-2-(p-tolyl)pyridazin-3(2H)-one (CAS 551921-36-9), molecular formula C17H12Cl2N2OS and molecular weight 363.26 g/mol, is a CATO reference standard with documented purity and traceability.

Based on its molecular formula C17H12Cl2N2OS, 5-Chloro-4-((4-chlorophenyl)thio)-2-(p-tolyl)pyridazin-3(2H)-one contains a steroid core, an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 363.26 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.

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

As a certified reference material (CRM), 5-Chloro-4-((4-chlorophenyl)thio)-2-(p-tolyl)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 FormulaC17H12Cl2N2OS
Molecular Weight363.26 g/mol
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)12.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1984
Halogen ContentCl-containing
Nitrogen Atoms2
Sulfur Atoms1

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