The toxic effects of repeated benzotrichloride exposure have been assessed for inhalation, dermal exposure and oral ingestion. After repeated exposure to a concentration of 12.8 mg/m3 twice weekly for 30 minutes, over 12 months in mice, severe bronchitis and bronchial pneumonia were observed. After exposure of 5.1 mg/m3 for 6 hours a day, 5 days a week for 4 weeks, no adverse effects were observed in rats. Note that the exposure times resemble a 5-day work week (although with only 30 hours).