Propylene glycol
<p><b>Propylene glycol</b>, also called <b>1,2-propanediol</b> or <b>propane-1,2-diol</b>, is an <a href="https://en.wikipedia.org/wiki/Organic_compound" title="Organic compound">organic compound</a> (a <a href="https://en.wikipedia.org/wiki/Diol" title="Diol">diol</a> or double <a href="https://en.wikipedia.org/wiki/Alcohol" title="Alcohol">alcohol</a>) with formula C<sub>3</sub>H<sub>8</sub>O<sub>2</sub>. It is a colorless, nearly odorless, clear, <a href="https://en.wikipedia.org/wiki/Viscous_liquid" title="Viscous liquid">viscous liquid</a> with a faintly sweet taste, <a href="https://en.wikipedia.org/wiki/Hygroscopic" title="Hygroscopic" class="mw-redirect">hygroscopic</a> and <a href="https://en.wikipedia.org/wiki/Miscible" title="Miscible" class="mw-redirect">miscible</a> with <a href="https://en.wikipedia.org/wiki/Water" title="Water">water</a>, <a href="https://en.wikipedia.org/wiki/Acetone" title="Acetone">acetone</a>, and <a href="https://en.wikipedia.org/wiki/Chloroform" title="Chloroform">chloroform</a>.
The compound is sometimes called <b>α-propylene glycol</b> to distinguish it from the isomer <a href="https://en.wikipedia.org/wiki/1,3-Propanediol" title="1,3-Propanediol">propane-1,3-diol</a> (β-propylene glycol).</p>