(3|A,5|A,17|A)-19-Norpregnane-3,17-diol 17|A-Ethyl-5|A-estrane-3|A,17|A-diol 19-Nor-5|A,17|A-pregnane-3|A,17-diol 31658-51-2 CAS 31658-51-2

Purity 97%+In StockPharmaceutical Standards
CAS No.31658-51-2
Molecular FormulaC20H34O2
Molecular Weight306.48 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

(3|A,5|A,17|A)-19-Norpregnane-3,17-diol 17|A-Ethyl-5|A-estrane-3|A,17|A-diol 19-Nor-5|A,17|A-pregnane-3|A,17-diol 31658-51-2 CAS 31658-51-2 chemical structure

Description

Compared with other compounds in its class, the molecular weight of 306.48 g/mol gives (3|A,5|A,17|A)-19-Norpregnane-3,17-diol 17|A-Ethyl-5|A-estrane-3|A,17|A-diol 19-Nor-5|A,17|A-pregnane-3|A,17-diol 31658-51-2 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

CATO supplies (3|A,5|A,17|A)-19-Norpregnane-3,17-diol 17|A-Ethyl-5|A-estrane-3|A,17|A-diol 19-Nor-5|A,17|A-pregnane-3|A,17-diol 31658-51-2 (CAS 31658-51-2), a certified reference material (molecular formula C20H34O2, MW 306.48 g/mol) for analytical method development and quality control.

Owing to a steroid core, a hydroxyl group, an ether linkage, (3|A,5|A,17|A)-19-Norpregnane-3,17-diol 17|A-Ethyl-5|A-estrane-3|A,17|A-diol 19-Nor-5|A,17|A-pregnane-3|A,17-diol 31658-51-2 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 306.48 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).

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 (3|A,5|A,17|A)-19-Norpregnane-3,17-diol 17|A-Ethyl-5|A-estrane-3|A,17|A-diol 19-Nor-5|A,17|A-pregnane-3|A,17-diol 31658-51-2 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 FormulaC20H34O2
Molecular Weight306.48 g/mol
AppearanceOff-white to pale yellow crystalline powder
Purity97%+
StorageStore at room temperature
Solubility (reference)Soluble in chloroform, dichloromethane, ethyl acetate, DMSO
StabilityMay oxidize slowly on prolonged air exposure
Degree of Unsaturation (DBE)4.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1966

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