Item #: 2967270 Phosphoric Acid (85%) - 1 oz. $1.99 Phosphoric acid is said to be tasteless while lactic in large quantities can potentially leave flavor. Being a lower conentration than the Lacitic, it is slower to change the pH of your water and therefore more forgiving to use.Lowers pH of mash &/or sparge. Contributes nutrients for yeast.10% concentration.