Iisulfide emanzini zinomngcipheko wokutsalwa yi-hydrolysis, nto leyo ekhupha i-H₂S emoyeni. Ukuphefumla ubungakanani obukhulu be-H₂S kunokubangela isicaphucaphu ngoko nangoko, ukuhlanza, ubunzima bokuphefumla, ukufuthaniseka, kunye nemiphumo emibi kakhulu. Ukuvezwa kuxinzelelo lomoya oluyi-15–30 mg/m³ kunokukhokelela kwi-conjunctivitis kunye nomonakalo kwi-optic nerve. Ukuphefumla ixesha elide kwe-H₂S kunokunxibelelana ne-cytochrome, i-oxidase, ii-disulfide bonds (-SS-) kwiiproteni kunye nee-amino acids, okuphazamisa iinkqubo ze-cellular oxidation kunye nokubangela i-hypoxia yeseli, enokuba yingozi ebomini.

Ibhetshi nganye ye-sodium sulfide ihlolwa ngamacandelo kwaye kufunyanwe ukungcola ukuze kususwe umngcipheko wokungcola okuvela kumthombo. Cofa apha ukuze ufumane iinkonzo zobungcali.