2-Phenyl-4-(p-tolyl)phthalazin-1(2H)-one CAS 57709-75-8

Purity 97%+In StockPharmaceutical Standards
CAS No.57709-75-8
Molecular FormulaC21H16N2O
Molecular Weight312.36 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

2-Phenyl-4-(p-tolyl)phthalazin-1(2H)-one CAS 57709-75-8 chemical structure

Description

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

2-Phenyl-4-(p-tolyl)phthalazin-1(2H)-one (CAS 57709-75-8) is a high-purity analytical reference standard with the molecular formula C21H16N2O and a molecular weight of 312.36 g/mol.

Structurally, 2-Phenyl-4-(p-tolyl)phthalazin-1(2H)-one (C21H16N2O) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 15.0, corresponding to approximately 15 ring(s) or double-bond equivalent(s). With a molecular weight of 312.36 g/mol, it falls into the moderately-high-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).

As a certified reference material (CRM), 2-Phenyl-4-(p-tolyl)phthalazin-1(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 FormulaC21H16N2O
Molecular Weight312.36 g/mol
AppearancePale yellow to yellow crystalline powder
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)15.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1973
Nitrogen Atoms2

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