17a-Methyl-5a-androstan-3a,17B-diol CAS 641-82-7

Purity 97%+In StockPharmaceutical Standards
CAS No.641-82-7
Molecular FormulaC20H34O2
Molecular Weight306.48 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

17a-Methyl-5a-androstan-3a,17B-diol CAS 641-82-7 chemical structure

Description

Structurally, 17a-Methyl-5a-androstan-3a,17B-diol (C20H34O2) contains a steroid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 306.48 g/mol, it falls into the moderately-high-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.

17a-Methyl-5a-androstan-3a,17B-diol (CAS 641-82-7), molecular formula C20H34O2 and molecular weight 306.48 g/mol, is a CATO reference standard with documented purity and traceability.

This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.

CATO manufactures 17a-Methyl-5a-androstan-3a,17B-diol 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.)1957

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