Noun
English Wikipedia has an article on:pyrithioneWikipedia
pyrithione (uncountable)
(organic chemistry) The tautomeric compound 1-hydroxy-2(1H)-pyridinethione (thione form) or 2-pyridinethiol 1-oxide (thiol form)
Depending on the application, these ingredients may include triglycerides, silicones, zinc pyrithione, etc. Source: Internet
Zinc pyrithione shampoos: These shampoos, which include Head & Shoulders, reduce the fungus that may be on your scalp. Source: Internet