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Promethazine
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==Chemistry== Solid promethazine [[hydrochloride]] is a white to faint-yellow, practically odorless, crystalline powder. Slow oxidation may occur upon prolonged exposure to air, usually causing blue discoloration. Its [[hydrochloride]] [[salt (chemistry)|salt]] is freely soluble in water and somewhat soluble in alcohol. Promethazine is a [[chirality (chemistry)|chiral]] compound, occurring as a mixture of [[enantiomer]]s.<ref name="rxlistone">{{cite web|url=http://www.rxlist.com/cgi/generic/phenergan.htm|title=RxList: Promethazine Description|date=21 June 2007|access-date=4 June 2008|archive-url=https://web.archive.org/web/20080911231224/http://www.rxlist.com/cgi/generic/phenergan.htm|archive-date=11 September 2008|url-status=dead}}</ref>
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