Formaldehyd Zigaretten Aren't Vapes Just Vapor? Nope. Some Vapes Contain Formaldehyde, An Formaldehyde Harmful Vape Chemicals Australia Clearing the Air: Do Vapes Still Contain Formaldehyde? E cigarette aerosol isn't just water vaporit contains toxic chemicals like formaldehyde and acrolein (yes, a weed killer!). Vaping can lead to lung disease, Popcorn Lung, and even a collapsed lung. Plus, secondhand All E Cigarettes Emit Harmful Chemicals, but Some Emit More Than Others Berkeley Lab Berkeley Lab News Center