... Industrial GradeNational Standard: GB 209-2006Appearance: Pure anhydrous sodium hydroxide is white translucent, crystalline solid. It was ... Solid 99%Application: The use of sodium hydroxide and alkaline desiccant, paper, aluminum smelting, refining tungsten, rayon ... of dyes, plastics, pharmaceutical and organic intermediates, old rubber regeneration system of metallic sodium, water electrolysis, as ...