Sulfides ni yɔɔ nu mli lɛ nyɛɔ etsɔɔ nu mli, ni ejieɔ H2S kɛyaa kɔɔyɔɔ mli. H2S babaoo ni mɔ ko muɔ lɛ baanyɛ aha mɔ aná shwiemɔ, shwiemɔ, mumɔ ni wa, shwiemɔ, kɛ tsofai fɔji ni naa wa aba amrɔ nɔŋŋ. Kɔɔyɔɔ ni mli eyi obɔ kɛ 15–30 mg/m3 lɛ baanyɛ aha mɔ ko aná hiŋmɛi mli hela ni efite hiŋmɛi mli tsɔne lɛ. H2S ni akɛwoɔ mɔ mli be kakadaŋŋ lɛ baanyɛ ekɛ cytochrome, oxidase, disulfide bonds (-SS-) ni yɔɔ protein kɛ amino acids mli lɛ afee ekome, ni efite bɔ ni wala yibii lɛ tsuɔ nii amɛhaa lɛ ni ekɛ wala yibii lɛ amli la ni haa wala yibii lɛ faaa lɛ baa, ni baanyɛ awo wala he gbeyei.

Sodium sulfide lɛ mli kuu fɛɛ kuu tsɔɔ emli nibii amlipɛimɔ mli kɛ muji ni ana koni ajie oshara ni yɔɔ muji ni jɛ he ni ejɛɔ lɛ mli lɛ kɛjɛ mli. Nyɛɛ biɛ koni ona ŋaalɔi anitsumɔi.