White or Almost White Crystalline Powder,Odorless;The Import Permit will be necessary for the controlled substances, please contact us for more information.
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<h3>Overview</h3>
<p><strong>Estriol</strong> (CAS 50-27-1; C<sub>18</sub>H<sub>24</sub>O<sub>3</sub>) is a naturally occurring weak estrogen synthesized via semisynthesis from plant sterols. It serves as a critical intermediate for pharmaceutical formulations and hormone replacement therapies.</p>
<h3>Application</h3>
<ul>
<li>Manufacture of vaginal creams for menopausal symptom management.</li>
<li>Component in combined oral contraceptives and HRT regimens.</li>
<li>Biomarker analysis in prenatal screening for fetal well-being.</li>
</ul>
<h3>Precautions</h3>
<p>Strictly store below 25°C in dry, light-resistant containers. Clinical use requires monitoring for thromboembolic risks; contraindicated in patients with history of estrogen-dependent malignancies or unexplained vaginal bleeding.</p>