formaldehyde is carcinogenic ( Cancer causing) in nature and there is risk of cancer associate with this to the personnel who is handling formaldehyde. It is not safe for the personnel. There are also other drawbacks like fumigation with formaldehyde causes irritation to the eyes and nose. After fumigation with formaldehyde there is requirement for de-fumigation of area in which AHU (Air Handling Unit) has to be continuously run for few hours without any activity to remove the residues from the air and cleaning and moping of equipments and area is also required.