Potassium chlorate is used in chemical oxygen generators ( also called chlorate candles or oxygen candles ) , employed as oxygen-supply systems of e.g. aircraft , space stations , and submarines , and has been responsible for at least one plane crash . A fire on the space station Mir was also traced to this substance . The decomposition of potassium chlorate was also used to provide the oxygen supply for limelights
plane crash
ValuJet Flight 592
Potassium chlorate