Substance
Benzene
Xylene
Toluene

Pathology
Irritation of mucous membranes and airway caused by agents and their metabolites, CNS depression, myocardial effects resulting in conduction disturbances.

Symptoms
Burning sensation of mouth and stomach, nausea, vomiting, chest pain, cough, headache, pneumonitis (if inhaled), vertigo, ataxia, confusion, stupor, ventricular dysrhythmias, convulsions, coma, respiratory failure, death.

Emergency Measures
Airway maintenance and ventilation assistance, activated charcoal and cathartic, therapy for arrhythmias and seizures. Gastric lavage within 30 min is useful for larger ingestions.

Comments
Chronic exposure can result in permanent renal damage, bone marrow suppression, and neuropsychological damage.