Toluene

A) Chronic toluene exposures at less than 200 ppm have been associated with headache, fatigue, and nausea, while workers repeatedly exposed at 200 to 500 ppm have reported loss of coordination, memory loss, loss of appetite, and reversible disorders of the optic nerves. Concentrations above this up to 1500 ppm have caused similar, but more severe effects. Exposure to air concentrations of toluene from 10,000 to 30,000 ppm may cause mental confusion, inebriation, and unconsciousness with a few minutes.
B) INGESTION: 60 mL was lethal in an adult.