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<h3>Overview</h3>
<p>Fuchsin basic (CAS <strong>632-99-5</strong>) is a synthetic triarylmethane dye produced via condensation of benzaldehyde and aniline derivatives. Its molecular formula is <strong>C<sub>20</sub>H<sub>19</sub>N<sub>3</sub>·HCl</strong>, appearing as deep red crystals soluble in water and alcohol.</p>
<h3>Application</h3>
<ul>
<li><strong>Microbiology:</strong> Primary stain in Gram staining and Ziehl-Neelsen acid-fast procedures.</li>
<li><strong>Textile Industry:</strong> Dyeing cotton, silk, and wool fibers for high-intensity coloring.</li>
<li><strong>Biological Research:</strong> Histological staining for visualizing nucleic acids and cell structures.</li>
</ul>
<h3>Precautions</h3>
<p>Limit clinical use due to potential carcinogenicity; avoid direct skin contact. Store in cool, dry, ventilated areas away from oxidizers and light sources to prevent degradation.</p>