These compounds are generally not significant precursors in the production of ground level ozone. Toxicity can be divided into three categories viz. The victim is unaware of the exposure, his health and mind gradually deteriorates and often he is unprepared for remedial action until it is too late. High concentrations of phenol taken internally or accidently splashed in large volumes on the skin will quickly cause acute poisoning and death, whereas long exposure to low concentrations of lead compounds will lead to chronic lead poisoning. They are carcinogens, mutagens, and tetrogens.
Chemical carcinogens are substances which induce cancer in humans and animals.
Vinyl chlorides have been identified as causative agents in cancer of the liver. Mutagens are substances which are capable of altering the body's genetic material i.e. the genes and chromosomes of the cells. Ethylono-oxide, a noncarcinogen, has been found to have mutagenic properties. Phthalate-esters are suspected as being tetrogens and are frequently used as plasticisors in coating formulations. Substances used in the formulations of coatings, which can be inhaled, are primarily the vapors of volatile liquids and solids.