A researcher was flame-sealing a glass tube using an oxy-gas torch. The tube had been dipped in liquid nitrogen to condense its contents before the sealing operation, so the researcher was using a lab wipe to handle the cold glass. The wipe ignited and fell into the laboratory waste box, which also ignited. The researcher extinguished the resulting fire using a dry-chemical extinguisher mounted in the hallway outside the lab. Neither the fire department nor Security was called, nor was the building fire alarm sounded.
See lessons learned and discussion questions in this Safety Note.