120 spray cans did this much destruction? It shattered windows of nearby buildings.
SAPPORO
A building explosion in northern Japan's Sapporo that injured 42 people on the weekend occurred after employees of a real estate office emptied about 120 deodorizer spray cans, a company operating the office said Tuesday.
The employees tried to empty 120 out of 160 new spray cans for disposal without knowing the gas was flammable, said Taiki Sato, the chief of the Hokkaido unit of Apamanshop Leasing Co. The explosion occurred after employees turned on a water heater.
The office had kept unused cans because there were some cases in which it did not carry out the odor removal service for properties despite customers having paid for it, he said.
According to the manufacturer of the deodorizer, the product continuously releases its contents for about four minutes.
Police believe the gas quickly filled up inside the room where doors and windows were closed and eventually triggered the blast, which damaged buildings as far as 100 meters. …
https://japantoday.com/category/national/Sapporo-blast-occurred-after-120-spray-cans-emptied