Planet Vapo Boutique de Cigarettes Electroniques, E liquides. Formaldehyde in E cigarettes, a Major Concern Ingredient of the Month: Formaldehyde & Acetaldehyde These chemicals are commonly found in tobacco smoke, e cigarette aerosols, and everyday products like furniture and building materials. Both are harmful to human health: Formaldehyde Got Health: Helping Teens Understand the Risks of Vaping