The phrase "a volatile topic" is correct and usable in written English.
It can be used to describe a subject that is likely to change rapidly or provoke strong emotions and reactions.
Example: "The debate over climate change is often considered a volatile topic, as it elicits passionate responses from various stakeholders."
Alternatives: "a contentious issue" or "a sensitive subject".
Because its subject is ever evolving — "Jonson, like his own creation, Volpone, moved with the agility of a player from one role to the next," as Donaldson puts it — the book moves at a lively clip, despite the occasional excessive divagation into the byways of court politics and the troublesome matter of religion, which remained a volatile topic throughout Jonson's life.
For a class studying the rise of extremist groups, David Schanzer wanted his students to cut through the fog of political rhetoric on a volatile topic.
We are well aware that immigration is a tricky issue and an emotionally volatile topic, and best dealt with directly.
Unfortunately, land use planning is a politically volatile topic that federal agencies avoid.
But abortion has proved to be a politically volatile topic for Mr. Romney, whose evolving views have disappointed liberals and stirred distrust among conservatives.
Ito had earlier precluded the defense from raising a potentially volatile topic with Reichardt by preventing the attorneys from questioning him about the drug use of his former girlfriend, Faye Resnick.
This will be a volatile issue, but every aspect of changing entitlements will be volatile.
Leonsis, 59, said when immigration became such a divisive and volatile topic of this election, he felt he had to do more than cut a check.
Growth is always a volatile political topic in San Diego, where residents pride themselves on their city's scenic mid-city canyons and generally unclogged freeways, and responded enthusiastically to Hedgecock's frequent exhortations to avoid the "Los Angelization" of San Diego.
