Abstract
Twenty one different metal chlorides have been tested for mutagenicity in the presence of 9-aminoacridine in strains of Salmonella typhimurium. BeCl2, FeCl2, MnCl2, NiCl2, SnCl4, ZnCl2, and ZrCl4, each of which was not mutagenic alone, exhibited mutagenicity when combined with 9-aminoacridine in strains TA1537 and TA2637.