Gona-1,3,5(10)-trien-17-one, 13-ethyl-3-methoxy-, (14β)-
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<h3>Overview</h3>
<p><strong>Levonorgestrel Impurity 5</strong> (CAS 846-10-2, C<sub>21</sub>H<sub>28</sub>O<sub>3</sub>) is a synthetic byproduct in the pharmaceutical manufacturing of levonorgestrel. It arises during specific oxidation or reduction steps in the core synthesis process.</p>
<h3>Application</h3>
<ul>
<li>Quality control reference standard for HPLC analysis in API production.</li>
<li>R&D validation for impurity profiling and stability testing protocols.</li>
<li>Toxicological assessment in regulatory submission dossiers.</li>
</ul>
<h3>Precautions</h3>
<p>Store under inert atmosphere at -20°C to prevent degradation. Handle with appropriate PPE in ventilated fume hoods due to potential reproductive toxicity hazards associated with steroid impurities.</p>