What does ethylene gas smell like?

Ethylene gas is odorless in its pure form, so it does not have a detectable smell. However, when produced in small quantities by ripening fruits, it can be associated with a sweet, fruity aroma. In industrial settings, ethylene can sometimes have a faint, sweet smell due to impurities or the presence of other substances. Overall, its lack of significant odor makes it challenging to detect without specialized equipment.