Minneapolis school evacuated after science classroom explosion

A teacher suffered minor injuries, burns and cuts when a combination of a crystallized form of hydrogen peroxide, hydrogen chloride, and acetone caused the explosion.

August 29, 2011, Minnestoa Public Radio News -- (Minnesota) Minneapolis school evacuated after science classroom explosion.

A north Minneapolis high school was evacuated August 29 morning after an explosion in a science classroom. The assistant chief of the Minneapolis Fire Department said crews were called to Patrick Henry High School at about 9:30 a.m. after a report of a chemical explosion.

"When they arrived there they found an injured male teacher [with] minor injuries, burns and cuts, and some damage to a table and some chairs in the science lab in a classroom," he said. The teacher was preparing for a classroom demonstration when the explosion occurred. "It was a combination of a crystallized form of hydrogen peroxide, hydrogen chloride, and acetone," he added.

"These chemicals had been mixed and prepared several days in advance." No students were in the classroom at the time of the explosion. The injured teacher was taken to North Memorial Medical Center for treatment of minor burns and cuts. Evacuated students were allowed back into the school at around 11:15 a.m. August 29.

Link: http://minnesota.publicradio.org/display/web/2011/08/29/minneapolis-school-evacuated-after-science-classroom-explosion/

Source: DHS Daily Open Source Infrastructure Report 31 August 2011