*The following content is generated by AI and is for reference only.
<h3>Overview</h3>
<p>Pemetrexed Impurity 5 is a critical synthetic intermediate and reference standard used in the pharmaceutical manufacturing of <strong>pemetrexed disodium</strong>. This compound serves as an essential control material for quality assurance, ensuring the purity of the active pharmaceutical ingredient (API) during production. The molecular formula is <strong>C20H24N6O5S</strong> with CAS number <strong>189799-43-7</strong>.</p>
<h3>Application</h3>
<ul>
<li><strong>Quality Control:</strong> Utilized by API manufacturers to validate HPLC methods and detect trace impurities.</li>
<li><strong>R&D Development:</strong> Applied in stability studies to monitor degradation pathways of pemetrexed formulations.</li>
<li><strong>Regulatory Compliance:</strong> Provided as a certified reference standard for FDA and EMA submission dossiers.</li>
</ul>
<h3>Precautions</h3>
<p>Store strictly at -20°C in a dry, inert atmosphere to prevent hydrolysis. Handle only within a certified fume hood using appropriate PPE due to potential mutagenicity. Do not use directly in clinical settings; this material is for laboratory research and analytical calibration only.</p>