Formaldehyde is a chemical once used widely in construction.  Gases from this substance can be very health hazardous.

During the 1970s and the 1980s, formaldehyde insulation was installed in a great number of buildings in the United States and elsewhere.  It was popular because of its effective and inexpensive thermal insulant properties.  However, soon after installation, formaldehyde gas would begin to leak.  This colorless yet strong-odored gas can be very damaging to humans.  In addition to its role in building construction, formaldehyde is commonly found in both cigarette smoke and automobile exhaust.

Many adverse effects can result from inhalation of these toxic gases.  These include eye, nose, throat, and skin irritation; respiratory illness; dizziness; headaches; and nausea.  Formaldehyde gas is also thought to be a carcinogen.

What to do if you have been exposed