Short answers, pulled from the story.
John Williams Reynolds identified propylene in 1850 as the only gaseous product of thermal decomposition from amyl alcohol. This discovery occurred under the supervision of A. W. von Hoffmann's student while chemists were beginning to map hydrocarbon behavior.
The chemical formula for propylene remains CH3CH=CH2 despite decades of standard notation changes. Steam cracking using propane or naphtha serves as the dominant global technology for producing this compound.
Approximately 85 million tonnes of propylene were processed globally in 2013 alone. Polypropylene manufacturers consume nearly two thirds of this production annually to create films, fibers, containers, and packaging materials.
The United States and some European countries established a threshold limit value of 500 ppm for occupational eight-hour time-weighted average exposure. Flammability and explosion risks remain primary safety hazards requiring careful handling protocols worldwide.
On the 30th of September 2013, NASA announced confirmation of propene within Titan's atmosphere using infrared spectroscopy data. A team led by NASA GSFC scientist Conor Nixon analyzed information gathered from Cassini orbiter spacecraft instruments.