A low structure precipitated silica having a narrow particle distribution of soft particles and a mean value (MV) particle size ranging from 8 to 14 microns, an oil absorption ranging from 60 to 120 cc/lOOg a mercury intrusion void volume of 1.0 to 4.0 cc/g is useful in dentifrice formulations to provide a Pellicle Cleaning Ratio of fron 70 to 140 and a Radioactive Dentin Abrasion value of 60 to 130, and a ratio of Pellicle cleaning Ratio to Radioactive Dentin Abrasion ranging from 1.1 to 1.9, in the dentifrice. The silica is prepared by a fresh water acidulation process in the absence of an electrolyte, characterized in longer acidulation times, and lenge digestion and ouring periods to achieve onifom particles of relatively less hard silica particles.
