*The following content is generated by AI and is for reference only.
<h3>Overview</h3>
<p>Sildenafil EP Impurity B is a critical reference standard defined in the European Pharmacopoeia for quality control of Sildenafil citrate. Synthesized via specific organic pathways, it serves to identify and quantify degradation products. The molecular formula is <strong>C22H19N7O4S</strong> with CAS No. <strong>137862-54-5</strong>.</p>
<h3>Application</h3>
<ul>
<li><strong>Pharmaceutical QC:</strong> Used as analytical standards to validate HPLC methods during drug substance manufacturing.</li>
<li><strong>R&D:</strong> Supports stability-indicating studies to monitor impurity profiles under stress conditions.</li>
<li><strong>Regulatory Compliance:</strong> Essential for generating data required by EMA and FDA submissions.</li>
</ul>
<h3>Precautions</h3>
<p>Store strictly at 2-8°C in airtight containers away from light. Handle only within certified fume hoods using appropriate PPE due to potential toxicity. Do not use for clinical administration; strictly for laboratory analysis only.</p>