It has come to my attention that a irritant gas or aerosol has been released in the airport today causing the site to be closed down. One reports suggest that a pepper spray was discharged by “some clown” into the ventilation system. Some of my readers might want to know what is in pepper spray, these sprays are typically capsaicin and the other active chemicals in chill peppers in a solvent with a propellant to allow it to be discharged as a spray.
Capsaicin is quite a simple compound, here is a picture of a molecule of it.
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