Despite more than 100 published studies by government scientists and university laboratories that have raised health concerns about a chemical compound that is central to the multibillion-dollar plastics industry, the Food and Drug Administration has deemed it safe largely because of two studies, both funded by an industry trade group. The compound, bisphenol A (BPA), has been linked to breast and prostate cancer, behavioral disorders and reproductive health problems in laboratory animals. The FDA's position on the compound was called into question earlier this month when a National Institutes of Health panel issued a draft report linking BPA to health concerns. As part of his investigation, Rep. John D. Dingell (D-Mich.), chairman of the House Energy and Commerce Committee, wants to examine the role played by the Weinberg Group, a Washington firm that employs scientists, lawyers and public relations specialists to defend products from legal and regulatory action. The firm has worked on Agent Orange, tobacco and Teflon, among other products linked to health hazards, and congressional investigators say it was hired by Sunoco, a BPA manufacturer. From 1997 to 2005, 116 studies of the compound were published, many of them focused on its effects in low doses. Of those funded by government, 90 percent showed a health effect linked to BPA. None of the industry-funded studies found an effect; all of them said BPA is safe. There is a clear bias in studies funded by industry, said [David] Michaels, who ... runs the Project on Scientific Knowledge and Public Policy at George Washington University and wrote the book Doubt is Their Product, which details how various industries have used science to stave off regulation.