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<h3>Overview</h3>
<p><strong>4-Bromocrotonic Acid</strong> (CAS 1569-72-8, C<sub>4</sub>H<sub>5</sub>BrO<sub>2</sub>) is a brominated unsaturated carboxylic acid synthesized via hydrobromination of butynoic acid or oxidation of allyl bromide. It serves as a critical intermediate for pharmaceutical and agrochemical synthesis.</p>
<h3>Application</h3>
<ul>
<li>Pharmaceutical manufacturing: Precursor for anti-inflammatory agents and antihistamines.</li>
<li>Agrochemical industry: Intermediate in synthesizing herbicides and fungicides.</li>
<li>Material science: Building block for functional polymers with specific reactivity.</li>
</ul>
<h3>Precautions</h3>
<ul>
<li>Store in cool, dry, ventilated areas away from oxidizers.</li>
<li>Use PPE including gloves and goggles; avoid inhalation of dust.</li>
<li>Not approved for direct clinical use; industrial grade only.</li>
</ul>