Examples from the Web for ethylene
“There are similarities between propylene glycol and ethylene glycol, the anti-freeze used in automobiles,” Dale said.
Left alone in a fuel air explosive weapon or other container, ethylene oxide tends to self polymerize.
Ethylene burns with a bright luminous flame, and forms a very explosive mixture with oxygen.
This converts the alcohol into a gas known as ethylene (C2H4).Creative Chemistry|Edwin E. Slosson
The idea held up to about 1890 was that the illuminating value depended upon the amount of ethylene present.
Propylene oxide is less toxic than ethylene oxide but is still highly toxic.