5. Charge Caustic Soda, 50% (332036) to mix tank to increase pH of batch between 9.0 - 11.0. Increase agitation to maintain adequate surface movement but avoiding formation of a vortex which could result in aeration. Stir for a minimum of 35 minutes.
Note: Caustic Soda 50% Liquid (332036) is a BASE, has health rating of 3.