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Phosphorus pentachloride
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<p>Phosphorus pentachloride is the <a href="/facts/Chemical_compound/37FXqqtv">chemical compound</a> with the formula PCl5. It is one of the most important <a href="/facts/Phosphorus/27xCeIqs">phosphorus</a> chlorides/oxychlorides, others being <a href="/facts/Phosphorus_trichloride/PsQ1HXcl">PCl3</a> and <a href="/facts/Phosphorus_oxytrichloride/fwbrqPWI">POCl3</a>. PCl5 finds use as a <a href="/facts/Chlorination_reaction/vYrGVWcJ">chlorinating</a> reagent. It is a colourless, water-sensitive <a href="/facts/Solid/hj5UsXno">solid</a>, although commercial samples can be yellowish and contaminated with <a href="/facts/Hydrogen_chloride/7Wzkhomd">hydrogen chloride</a>. </p>