HEADLINES Published March8, 2017 By Staff Writer

Cancer-causing benzene discovered in e-cigarette vapors operated at high power

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Portland State University scientists have found that significant levels of cancer-causing benzene in e-cigarette vapors can form when the devices are operated at high power.

The finding by a research team headed by chemistry professor James F. Pankow were published March 8 in the online journal PLOS ONE.

Benzene, a component of gasoline, has been linked to a number of diseases, including leukemia and bone marrow failure. It is found in urban air because of industrial emissions and unburned gasoline in exhaust and fuel tank leakages. It has been named the largest single cancer-risk ambient air toxin in the United States.

The amount of benzene the PSU scientists measured from e-cigarettes depended greatly on the device. With one device operated at high power, and when the e-cigarette fluid additive chemicals benzoic acid or benzaldehyde were present, benzene levels were thousands of times higher than in ambient air. The levels, nevertheless, were still 50 to 100 times lower than in smoke from conventional cigarettes, which deliver considerable benzene.

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