Caustic soda

Used in many industries: pulp and paper industry for delignification (sulfate process) pulp, production of paper, cardboard, synthetic fibers, wood-fiber boards; in chemical industries to neutralize acids and acidic oxides, as a reagent or catalyst in chemical reactions, in chemical analysis for the titration, for etching aluminum and in the production of pure metals in oil refining for the production of oils; for manufacture of biodiesel fuel; as an agent for dissolving blockages of sewer pipes; cosmetology, agriculture. Registered as a food additive E524.