1. Definition of VOCs
Academic definition of VOCs: refers to organic chemicals with vapor pressure above 0.1mmhg (13.3pa) and boiling point below 260 ℃ (500 ℉) under normal conditions (20 ℃, 101.3kPa).
2. Characteristics of VOCs
-Both contain carbon element, and also contain non-metallic elements such as H, O, N, P, S and halogen.
-Low melting point, easy to decompose, and volatile. Both can participate in atmospheric photochemical reactions and produce photochemical smog in the sun.
-At room temperature, most of them are colorless liquids with pungent or special odors.
-Most of them are insoluble or hardly soluble in water, but easily soluble in organic solvents.
-There are millions of species, most of which are flammable and explosive, and some are toxic or even highly toxic.
-The relative vapor density is heavier than air.
3. Classification of VOCs
According to their chemical structure, VOCs can be divided into: hydrocarbons (alkanes, alkenes and aromatics), ketones, esters, alcohols, phenols, aldehydes, amines, nitriles (cyanide), etc.
4. Some VOCs listed in the physical and chemical properties of common VOCs
