A researcher finished flame-sealing an ampoule in a chemical fume hood, turning off the torch used and setting it down. While the researcher was storing the ampoule, the hot torch tip ignited a number of lab wipes and rubber stoppers that had been left in the hood, and the cotton insulation on a nearby solvent still containing 1-2L of highly flammable tetrahydrofuran (THF) also ignited.

Learn more about this incident, including lessons learned at Incident Fire NCB Jun2015