It provides a granular material comprising (i) at least 50% by weight based on the weight of the granular material Mixed Metal Compound Water insoluble phosphate Solid capable of Uniting of the formula (i): II where M is at least one of calcium, Magnesium, LANTHANUM and Cerium; M is at least Iron III (II) I); n - is at least n Valent anionSe provee un material granular que comprende (I) al menos 50% en peso en base al peso del material granular del compuesto metálico mixto insoluble en agua sólido capaz de unir fosfato de la fórmula (I): donde M II es al menos uno de magnesio, calcio, lantano y cerio; M III es al menos hierro (III); A n- es al menos un anión n-valente