Exists in three isomeric forms.
Commercial xylene is a mixture of isomers.
Auto ignition temp. Repeated or prolonged skin contact causes de-fatting and can lead to dermatitis. Repeated eye exposure to high vapor concentrations may cause reversible eye damage. Acute exposure to xylene vapor may cause central nervous system depression and minor reversible effects upon liver and kidneys. At high concentrations can cause dizziness, drowsiness, unconsciousness, pulmonary edema nausea, vomiting, abdominal pain etc.