Adjusting The Rheology Of The Paste Ensures Smooth And Upright Extrusion, Preventing Water Separation And Stratification HPC This toothpaste-grade, high-substitution HPC hydroxypropyl cellulose (HPC) is a multifunctional rheology stabilizer for oral care. It optimizes toothpaste rheology, resulting in smooth extrusion and firm shaping; it stabilizes and suspends abrasives and abrasive particles, effectively inhibiting water separation and stratification, and ensuring