ACS News Service Weekly PressPac: April 7, 2010

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• Science Inquiries: Michael Woods, Editor, 202-872-6293
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Household detergents, shampoos may form harmful substance in waste water

Scientists are reporting evidence that certain ingredients in shampoo, detergents and other household cleaning agents may be a source of precursor materials for formation of a suspected cancer-causing contaminant in water supplies that receive water from sewage treatment plants. The study sheds new light on possible environmental sources of this poorly understood water...

Evidence that nanoparticles in sunscreens could be toxic if accidentally eaten

Scientists are reporting that particle size affects the toxicity of zinc oxide, a material widely used in sunscreens. Particles smaller than 100 nanometers are slightly more toxic to colon cells than conventional zinc oxide. Solid zinc oxide was more toxic than equivalent amounts of soluble zinc, and direct particle to cell contact was required to cause cell death. Their study is in ACS’ Chemical...

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