...Virginia Tech's Peter Vikesland found that the chlorine in tap water and the antibacterial agent found in some hand and dish soaps and other products can react to create chloroform, a probable carcinogen. He did not say or intend for anyone to conclude that the bacteria-busting chemical triclosan is patently unsafe and poses an immediate health concern...In what Vikesland called an apparent overreaction to his recent research, British retailer Marks & Spencer took triclosan-enhanced toothpastes off the shelf...Ciba Specialty Chemical, which says on its Web site that it invented triclosan, calls the chemical safe and effective.