*The following content is generated by AI and is for reference only.
<h3>Overview</h3>
<p><strong>Atorvastatin Lactam Sodium Salt Impurity</strong> is a critical reference standard derived from the oxidative degradation of atorvastatin calcium. It serves as an essential tool for method validation in pharmaceutical quality control. The compound typically features a specific lactam structure within its molecular framework, characterized by the molecular formula C<sub>25</sub>H<sub>31</sub>FN<sub>2</sub>O<sub>5</sub>S and CAS No. 174908-66-8.</p>
<h3>Application</h3>
<ul>
<li>Quality Control: Used in HPLC/GC assays to identify and quantify trace impurities in active pharmaceutical ingredients.</li>
<li>R&D Support: Facilitates stability-indicating studies during drug development and formulation optimization.</li>
<li>Regulatory Compliance: Ensures adherence to ICH Q3A/Q3B guidelines for impurity profiling in atorvastatin products.</li>
</ul>
<h3>Precautions</h3>
<p>Store strictly below -20°C in a desiccated environment under inert gas to prevent hydrolysis. Handle with appropriate PPE to avoid skin contact or inhalation, as it may exhibit irritant properties.</p>