Na sodium hydroxide bụ a ukwuu caustic isi na alkali na decomposes protein na nkịtị ihere okpomọkụ na ike ime ka oké chemical ọkụ. Ọ bụ ukwuu soluble na mmiri, na ngwa ngwa na-amịkọrọ mmiri na carbon dioxide si ikuku. Ọ na-etolite a usoro nke hydrates NaOH·nH2O. The monohydrate NaOH·H2O crystallizes si mmiri ihe ngwọta n'etiti 12.3 na 61.8 ° C. The commercially dị "sodium hydroxide" bụ mgbe a monohydrate, na e bipụtara data nwere ike na-ezo aka na ya kama nke anhydrous compound. Dị ka otu n'ime ndị kasị mfe hydroxides, ọ na-eji ugboro ugboro n'akụkụ na-anọpụ iche mmiri na hydrochloric acid na-egosi na pH na-achọ ka ọnụ ọgụgụ nke onwu.
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