The chemical name of formaldehyde in the electronic cigarette test is HCHO, which can also be written as CH2O. It is a colorless gas with a pungent smell. It is toxic and easily soluble in water.
Irritant to human eyes and nose. The relative density of gas is 1.067 (air=1). Melting point -92°C, boiling point -19.5°C. Soluble in water and ethanol. The concentration of the aqueous solution can reach up to 55%, generally 35%-40%, usually 37%, called formaldehyde water, commonly known as formalin (formalin).
The e-cigarette liquid contains formaldehyde, but compared with traditional tobacco products, the formaldehyde content is lower. Studies have shown that under normal use conditions, the formaldehyde content of e-cigarettes is 5 to 15 times that of traditional cigarettes, and it is dozens of times, or even hundreds of times, the maximum allowable concentration of formaldehyde in indoor air in my country.