Sodium hydroxide (NaOH), nke a makwaara dị ka lye na soda caustic, bụ onyinye anaghị arụ ọrụ. Ọ bụ ọcha siri ike na nke siri ike nke nwere ike na nnu nke alkali nke sodium nke dị na pellets, flakes, granules, yana ihe ngwọta edobere n'ọtụtụ ọnụọgụ dị iche iche. Sodium hydroxide bụ ihe dịka 50% (site na ibu) ihe eji mejupụta mmiri.; A na-agbaze sodium hydroxide na mmiri, ethanol, na methanol. Alkali a na - egbu mmụọ ma na - amị mmiri na ikuku carbon dioxide n’ikuku.