Chemical weapon
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A chemical weapon was a device which used chemicals.
On Earth, chemical weapons were tested in Dead Loch (PROSE: Harry Sullivan's War [+]Loading...["Harry Sullivan's War (novel)"]) and on Gravonax Island. (AUDIO: Night Thoughts [+]Loading...["Night Thoughts (audio story)"]) Chemical weapons were developed at A. H. Millington's base. (TV: The Curse of Fenric [+]Loading...["The Curse of Fenric (TV story)"])
On Skaro, chemical weapons were used in the first century of the Thousand Year War, which resulted in the creation of the Mutos. (TV: Genesis of the Daleks [+]Loading...["Genesis of the Daleks (TV story)"])