Wikipedia
Phosphorus pentachloride
Phosphorus pentachloride is the chemical compound with the formula PCl. It is one of the most important phosphorus chlorides, others being PCl and POCl. PCl finds use as a chlorinating reagent. It is a colourless, water- and moisture-sensitive solid, although commercial samples can be yellowish and contaminated with hydrogen chloride.
Usage examples of "phosphorus pentachloride".
It was to produce phosphorus pentachloride, the starter chemical for organic phosphorus, which is one of the ingredients of nerve gas.