... a yellow stain on fabric and paper.Pure anhydrous sodium hydroxide is white translucent, crystalline solid. It ... flakes, solid, and granular. 2.ApplicationThe use of sodium hydroxide and alkaline desiccant, paper, aluminum smelting, refining tungsten ... metallic sodium, water electrolysis, as well as inorganic salt production, preparation of borax, chromium salt, potassium permanganate, phosphate, etc ...