Benzene is dangerous even at low levels according to a study from China and the US. The study reveals that benzene is harmful to human blood cells even when inhaled at levels below the US exposure limits for the workplace of 1 part per million over eight hours. The findings by Qing Lan and Nathaniel Rothman at the National Cancer Institute and Martyn Smith at the University of California Berkeley suggest that regulatory authorities must re-evaluate the occupational safety limits on this and related compounds. It also raises new concerns regarding environmental exposure from cigarette smoke, gasoline, and vehicle exhausts.
Benzene toxic, shock!