the present invention relates to a composition comprising an antimicrobial effective amount of a biocide selected from the group consisting of aromatic 2 - n - hydroxy - thiourea and n - hydroxy - quinazolinone , and derivatives and combinations thereof , and at least one component selected from the group consisting of soaps , shampoos , skin - care medicaments , cosmetics , plastics and paints . also disclosed is a novel process for making the biocide .