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<h3>Overview</h3>
<p><strong>3-Bromo-5-chlorobenzenesulfonyl chloride</strong> is a versatile sulfonylating agent used in organic synthesis. Molecular formula: C6H3BrClNO2S; CAS: 13089-67-7. Core process involves chlorosulfonation of bromochlorobenzene.</p>
<h3>Application</h3>
<ul>
<li>Synthesis of sulfonamide pharmaceuticals and agrochemicals.</li>
<li>Production of dyes and optical brighteners.</li>
<li>Intermediate for specialized polymer additives.</li>
</ul>
<h3>Precautions</h3>
<p>Store in cool, dry place away from moisture. Use PPE due to corrosive nature; avoid inhalation and skin contact. Not for direct clinical use without formulation.</p>