Estriol EP Impurity I CAS 15370-49-7

Description

Compared with other compounds in its class, the molecular weight of 286.37 g/mol gives Estriol EP Impurity I distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

Estriol EP Impurity I (CAS 15370-49-7) is a certified pharmaceutical impurity reference standard with the molecular formula C18H22O3 and a molecular weight of 286.37 g/mol.

Owing to a steroid core, a hydroxyl group, an ether linkage, Estriol EP Impurity I is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 286.37 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).

This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.

CATO manufactures Estriol 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

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