... almost white white crystalline powder, Sour fruit Food grade fumaric acid, used as food preservative, preservatives, antioxidants etc.. Fumaric acid Keyword: ... : 0.1% max moisture: 0.5% max Usage: Food grade fumaric acid as chemical intermediate --an acid and acidifier ... can override Malic acid and citric acid acting as food preservative, preservatives, antioxidants etc.. Its acidity is 1.5 times ...