(4Z)-3-Ethoxy-4-{[(4-methoxyphenyl)amino]methylidene}-1-phenyl-4,5-dihydro-1H-pyrazol-5-one CAS 338750-99-5

Purity 97%+In StockPharmaceutical Standards
CAS No.338750-99-5
Molecular FormulaC19H19N3O3
Molecular Weight337.37 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

(4Z)-3-Ethoxy-4-{[(4-methoxyphenyl)amino]methylidene}-1-phenyl-4,5-dihydro-1H-pyrazol-5-one CAS 338750-99-5 chemical structure

Description

Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including (4Z)-3-Ethoxy-4-{[(4-methoxyphenyl)amino]methylidene}-1-phenyl-4,5-dihydro-1H-pyrazol-5-one.

CATO supplies (4Z)-3-Ethoxy-4-{[(4-methoxyphenyl)amino]methylidene}-1-phenyl-4,5-dihydro-1H-pyrazol-5-one (CAS 338750-99-5), a certified reference material (molecular formula C19H19N3O3, MW 337.37 g/mol) for analytical method development and quality control.

Structurally, (4Z)-3-Ethoxy-4-{[(4-methoxyphenyl)amino]methylidene}-1-phenyl-4,5-dihydro-1H-pyrazol-5-one (C19H19N3O3) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 12.0, corresponding to approximately 12 ring(s) or double-bond equivalent(s). With a molecular weight of 337.37 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

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

CATO manufactures (4Z)-3-Ethoxy-4-{[(4-methoxyphenyl)amino]methylidene}-1-phenyl-4,5-dihydro-1H-pyrazol-5-one under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.

Physical & Chemical Properties

Molecular FormulaC19H19N3O3
Molecular Weight337.37 g/mol
AppearancePale yellow to yellow crystalline powder
Purity97%+
StorageStore at 2-8°C, protect from light, keep sealed and dry
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)12.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)2025
Nitrogen Atoms3

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