Sodium sulfide, chinthu chosapangidwa chomwe chimadziwikanso kuti fungo la alkali, fungo la soda, chikasu cha alkali, kapena sulfide alkali, ndi ufa wopanda mtundu wa kristalo mu mawonekedwe ake oyera. Ndi wosalala kwambiri ndipo umasungunuka mosavuta m'madzi, zomwe zimapangitsa kuti madzi azikhala ndi mphamvu za alkali kwambiri. Kukhudzana ndi khungu kapena tsitsi kungayambitse kutentha, chifukwa chake dzina lake lodziwika bwino ndi "sulfide alkali." Ikayikidwa mumlengalenga, madzi a sodium sulfide amasungunuka pang'onopang'ono ndikupanga sodium thiosulfate, sodium sulfite, sodium sulfate, ndi sodium polysulfide. Pakati pa izi, sodium thiosulfate imapangidwa mwachangu kwambiri, zomwe zimapangitsa kuti ikhale chinthu chachikulu chosungunuka. Sodium sulfide imakhalanso ndi vuto la deliquescence ndi carbonation mumlengalenga, zomwe zimapangitsa kuti mpweya wa hydrogen sulfide uwonongeke komanso kutulutsidwa kosalekeza. Sodium sulfide yamagetsi nthawi zambiri imakhala ndi zonyansa, zomwe zimapangitsa kuti mitundu monga pinki, bulauni wofiira, kapena bulauni wachikasu. Mphamvu yeniyeni, malo osungunuka, ndi malo owira a chinthucho zimatha kusiyana chifukwa cha mphamvu ya zonyansazi.

Sodium sulfide ili ndi satifiketi ya SGS ya chipani chachitatu, satifiketi ya kalasi ya mafakitale, ndipo yapambana satifiketi ya ISO yapadziko lonse lapansi yaukadaulo ndi satifiketi yotsatizana ndi REACH.