Formaldehyde (HCHO) is a colorless, easily soluble, irritating new body that is gaseous at room temperature and readily soluble in water. 35%-40% aqueous formaldehyde solution is called formalin. Formaldehyde is toxic. It can cause discomfort when there is a trace amount of formaldehyde in the air, such as high concentration or even death. Formaldehyde is…