Formaldehyde is a colorless and acrid gas often used in the manufacturing of common household items.
One of the most toxic and carcinogenic pollutants you can breathe in, it's found in adhesives, wood products (such as plywood), new carpets, furniture pieces, paints, gas stoves, pet care products, insulation materials and more.
When something gives off formaldehyde, it is released into the air through a process called off-gassing.
Even though there are higher concentrations of formaldehyde in homes with new products or newly constructed parts, it's safe to say that some formaldehyde is commonly present in most homes- found in furniture to cosmetics.