article_snippet: Students had to be evacuated and emergency services called after concerns were raised about a sample of a acetone peroxide - a highly dangerous chemical often used in improvised attacks by terrorists - being accidentally turned into an explosive form at a Manchester University laboratory.
article_snippet: Students had to be evacuated after concerns were raised about a sample of a acetone peroxide being accidentally turned into an explosive form at a Manchester University laboratory (above)
article_snippet: Danger: the emergency services were called after concerns were reported to police that acetone peroxide had become 'crystalised' during an experiment in a lab, making it volatile .
article_snippet: Army bomb disposal experts and the emergency services were called after concerns were reported to police that acetone peroxide had become 'crystalised' during an experiment in a lab, making it volatile.
article_snippet: Acetone peroxide is a highly explosive chemical made by mixing acetone, hydrogen peroxide and acid.
highlights_snippet: Acetone peroxide is believed to have crystalised, creating explosion risk .
  