It is mostly used as a strong chemical base in the manufacture of pulp and paper, textiles, drinking water,soaps and detergents. Caustic Soda PearlsSynonyms: Sodium hydroxide, Caustic ... is the principal strong used in the chemical industry.Generally it is used in chemical analysis, Soap production, Paper making, Alumina production, Biodiesel, Aluminium etching, Food preparation and ...