Ethinylestradiol EP Impurity I CAS 67703-68-8

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.67703-68-8
Molecular FormulaC20H22O2
Molecular Weight294.39 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Ethinylestradiol EP Impurity I CAS 67703-68-8 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 Ethinylestradiol EP Impurity I.

Ethinylestradiol EP Impurity I (CAS 67703-68-8) is a certified pharmaceutical impurity reference standard with the molecular formula C20H22O2 and a molecular weight of 294.39 g/mol.

Based on its molecular formula C20H22O2, Ethinylestradiol EP Impurity I contains a steroid core, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 294.39 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.

CATO manufactures Ethinylestradiol EP Impurity I 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 FormulaC20H22O2
Molecular Weight294.39 g/mol
AppearancePale yellow to yellow crystalline powder
Purity>95%
StorageStore at 2-8°C, protect from light
Solubility (reference)Soluble in chloroform, dichloromethane, ethyl acetate, DMSO
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)10.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1976

Related Ethinylestradiol Standards

Recommended Standards

Why CATO?