I-sodium sulfide (Na₂S), umenzi wokwehlisa onamandla nekhemikhali le-alkaline elisetshenziswa ekushukeni isikhumba (ukususa uboya ngokuncibilikisa i-keratin), ekucutshungulweni kwe-pulp (inqubo ye-kraft) nasekwakhiweni kwamakhemikhali. Linamandla kakhulu okushisa futhi likhipha igesi enoshevu ye-hydrogen sulfide uma lithinta ama-asidi. Lidinga ukuphathwa ngokucophelela nezimpahla zokuzivikela eziphelele.