... or crystals with an odor of benzoin - ISO,HALAL,KOSHER, - Ammonium Propionate food preservative are used as a food preservative with ... white powder- aslo called Propionic acid, ammonium salt;Propanoic acid, ammonium salt;Propanoic acid,ammonium salt;Propionic acid ammonium- .Properties: white crystal. Melting point ...