... % Food Grade Fumaric Acid is produced by the oxidation of benzene,the color can reach to 15,content is 99 ... preservatives industry.Feed Grade Fumaric Acid,content of 99.5%,mainly for the production of feed acidifier,and feed composite acidifier, ... can replace antibiotics,reduce the PH value of livestock intestines,promote the growth and reproduction of beneficial bacteria to enhance feed palatability ...