VOC (Volatile Organic Compounds)
Volatile Organic Compounds is a general term to refer organic chemical substances, which easily volatilize in a normal temperature and a normal pressure conditions.
Other than volatilization of solvent such as toluene, benzene, acetate, MIBK and so on, they can be caused by decomposition of adhesive or resin composing ingredients such as formaldehyde, acetaldehyde, amines, and so on. Some natural substances, such as hexanal or limonene, are also designated as VOC.