The Health Effects of Vaping Indoors Indoor Doctor Clearing the Air: Do Vapes Still Contain Formaldehyde? Formaldehyd Zigaretten Aren't Vapes Just Vapor? Nope. Some Vapes Contain Formaldehyde, An Formaldehyde Harmful Vape Chemicals Australia While humidifiers release only HO, vapes release formaldehyde, lead, arsenic, and more. Don't be fooledvape clouds carry toxic chemicals that can seriously harm your lungs. NOT (Not on Tobacco) is a free Bootleg marijuana vapes produce vapor tainted with formaldehyde, tests show E cigarettes examined: Do they contain formaldehyde?