*The following content is generated by AI and is for reference only.
<h3>Overview</h3>
<p>Sitagliptin Impurity 21 is a critical degradation product of the antidiabetic drug Sitagliptin. It serves as a reference standard for quality control in pharmaceutical manufacturing. The molecular formula is <strong>C16H25N5O4</strong> and CAS number is <strong>870992-43-9</strong>.</p>
<h3>Application</h3>
<ul>
<li><li>Pharmaceutical R&D for method development.</li>
<li>Quality assurance testing for drug substance purity.</li>
<li>Stability indicating studies under stress conditions.</li></li>
</ul>
<h3>Precautions</h3>
<p>Store in a cool, dry place below 25°C. Handle with appropriate PPE to avoid skin contact. Strictly limit exposure during synthesis to ensure operator safety and prevent contamination.</p>