rebuttal http://www.bisphenol-a.org/about/faq.html BPA or Bisphenol FAQ site chemical industry claims 4,4′-dimethylmethylenediphenol Bisphenol A BPA or Bisphenol FAQ site says 4,4′-dimethylmethylenediphenol BPA or Bisphenol FAQ site 4,4′-dimethylmethylenediphenol BPA or Bisphenol FAQ site BPA or Bisphenol FAQ site 4,4′-dimethylmethylenediphenol BPA or Bisphenol FAQ site BPA BPA website BPA or Bisphenol FAQ site 4,4′-dimethylmethylenediphenol BPA BPA BPA issue BPA or Bisphenol FAQ site BPA or Bisphenol FAQ site 4,4′-dimethylmethylenediphenol website chemical industry claims there is no known risk from human consumption