Higher levels can cause you to feel dizzy, lightheaded, and to pass out. Death can occur. Repeated exposures can damage bone marrow causing low blood cell count. It can also damage the liver and kidneys. Toluene can cause slowed reflexes, trouble concentrating, and headaches.
Prolonged contact can cause a skin rash.
It is used as a solvent and in aviation gasoline, making other chemicals, perfumes, medicines, dyes, explosives, and detergents. Definitions are attached. Exposure to hazardous substances should be routinely evaluated. This may include collecting air samples. Under OSHA 1910.20, you have a legal right to obtain copies of sampling results from your employer.