of these chemicals (content is from wikipedia): Xanthan gum -  is a  polysaccharide  used as a  food additive  and  rheology  modifier. It is produced by  fermentation of  glucose  or  sucrose  by the  Xanthomonas campestris   bacterium. Sodium benzoate - also called  benzoate of soda , has thechemical formulaNaC 6 H 5 CO