Fysal HBF is a blend of short chain organic acids in a partially buffered form to improve handling and reduce volatility. It contains as its main ingredient, formic acid and ammonium formate. Being a blend of acids with a range of dissociation points, the product exhibits direct antibacterial effect at a range of pH thus working throughout the digestive tract. Targeted towards gram negative bacteria such as salmonella it is used in highly buffered feeds such as layer and broiler breeder diets.