*The following content is generated by AI and is for reference only.
<h3>Overview</h3>
<p>Xylenol Orange sodium salt (CAS <strong>63721-83-5</strong>) is a metallochromic indicator synthesized via sulfonation and condensation of xylenol orange with sodium hydroxide. Its molecular formula is <strong>C<sub>31</sub>H<sub>28</sub>N<sub>2</sub>O<sub>13</sub>S<sub>4</sub>Na<sub>2</sub></strong>. This compound serves as a critical reagent for complexometric titrations in industrial quality control.</p>
<h3>Application</h3>
<ul>
<li><strong>Water Treatment:</strong> Monitoring calcium, magnesium, and heavy metal ions in effluent analysis.</li>
<li><strong>Pharmaceuticals:</strong> Quantitative determination of rare earth elements during active ingredient synthesis.</li>
<li><strong>Chemical Manufacturing:</strong> Quality assurance for metal catalyst purity verification in polymer production.</li>
</ul>
<h3>Precautions</h3>
<p>Store in a cool, dry place away from light to prevent degradation. Avoid inhalation of dust; wear appropriate PPE including gloves and eye protection. Not approved for direct clinical administration or dietary use.</p>