Sodium hydroxide (NaOH), wanda kuma aka sani da caustic soda, lye da Piece of alkali, wani fili ne na inorganic.Yana da wani farin m da sosai caustic karfe tushe da alkali gishiri na sodium wanda yake samuwa a cikin pellets, flakes, granules, kuma kamar yadda tattalin mafita a da dama daban-daban yawa.Sodium hydroxide yana samar da kusan 50% (ta nauyi) cikakken bayani tare da ruwa.;Sodium hy Droxide yana narkewa a cikin ruwa, ethanol, da me thanol.Wannan alkali yana da lalacewa kuma yana ɗaukar danshi da carbon dioxide cikin iska.
Ana amfani da sodium hydr oxide a masana'antu da yawa, galibi a matsayin tushen sinadarai mai ƙarfi wajen kera ɓangaren litattafan almara da takarda, kayan yadi, ruwan sha, sabulu da wanki da kuma tsabtace magudanar ruwa.