Caustic soda bụ otu n'ime ọgwụ ndị a na-ejikarị eme ihe. A na-eji ya eme ihe iji wepụ acid; ihe ọṅụṅụ sodium; mee ka ọla kọpa astheir hydroxides; na nnụcha mmanụ ala; na thesaponification nke esters; na ọgwụgwọ cellulose, plastik, na roba; na ọtụtụ synthetic na nyocha ngwa.

A na-ere sodium hydroxide n'ahịa ka ọ bụrụ flakes ma ọ bụ pellet na-ekpo ọkụ ma ọ bụ dịka 50% ma ọ bụ 73% ngwọta mmiri. O nwere ọtụtụ ojiji ụlọ ọrụ na-eme ihe ma bụrụ otu n'ime kemịkalụ 10 kachasị elu n'ihe gbasara mmepụta na ojiji n'ọ̀tụ̀tụ̀ zuru ụwa ọnụ. A na-eji ihe dị ka nde tọn 15 sodium hydroxide kwa afọ. Ojiji kachasị ukwuu, na-eri ihe dị ka ọkara nke mmepụta ya, bụ ntọala n'ịmepụta kemịkalụ ndị ọzọ. A na-eji ya iji chịkwaa pH na neutralize acid na usoro kemịkal. Ụlọ ọrụ na-emepụta akwụkwọ na-eji sodium hydoxide mee ihe n'ụzọ dị ukwuu na usoro nsị. A na-eji sodium hydroxide kewaa eriri site na igbari lignin njikọ. A na-eji ya mee ihe n'ụdị ejiji na mmepụta nke rayon si cellulose. Sodium hydroxide bụ kemịkalụ bụ isi na ụlọ ọrụ ncha. N'ime usoro saponification, triglycerides enwetara site na anụmanụ na osisi na-ekpo ọkụ n'ihe ngwọta abasic iji nye glycerol na ncha:

A na-eji sodium hydroxide na ụlọ ọrụ akwa maka ịcha ọcha na ọgwụgwọ akwa iji mee ka ha dị ngwa ngwa. Ụlọ ọrụ mmanụ ala na-eji sodium hydroxide na-egwupụta apịtị na asa bactericide. A na-eji sodium hypochlorite (NaOCl) eme ihe n'ọtụtụ ebe maka ihicha yana dị ka ihe na-emerụ ahụ. A na-akwado Sodiumhypochlorite site na iji sodium hydroxide meghachi omume chlorine: Cl2(g) + 2NaOH(aq) →NaOCl(aq) + NaCl(aq) + H2O(l). A na-eji sodium hydroxide na ụlọ ọrụ nri maka ihicha na ịcha mkpụrụ osisi na akwụkwọ nri. Sodium hydroxide bụ obere ihe eji eme ihe n'ọtụtụ ngwaahịa ụlọ, mana n'ime ole na ole ọ nwere ike bụrụ ihe karịrị ọkara nke ngwaahịa ahụ. Dranocrystals nwere n'etiti 30% na 60% sodium hydroxide na ụfọdụ ndị na-ehicha mmiri nwere ike ịgụnye 100% sodium hydroxide.