Formaldehyde has a bad reputation in the USA. It has been used industrially in carpets, pressed board materials, embalming and in fabric treatments, but all these uses are waning. Formaldehyde is listed as an indoor air pollutant and can be the cause of flu-like symptoms if exposed to it long enough (for some people). Many ovens have formaldehyde in the insulation materials surrounding the heating cabinet. When using the self-cleaning feature of the oven, larger than normal amounts of formaldehyde are released into the atmosphere.
It is also used to preserve tissues for medical analysis. We keep birds and our veterinarian provides us with formaldehyde to deposit tissue or other samples for examination later. She gave us the formaldehyde with the express instruction to keep it FAR away from our children and out pets, and under lock and key. Formaldehyde is also a suspected carcinogen.
Dave