Hydrogen sulfide is an inorganic compound in its general state as a gas, colorless, with a rotten egg odor at low concentrations, and highly toxic. Hydrogen sulfide is a strong neurotoxin and has a strong irritating effect on mucous membranes. Inhalation of hydrogen sulfide will appear respiratory and eye irritation and other symptoms, can cause olfactory nerve paralysis, inhalation time is a little longer will also cause pulmonary edema, serious cases can be due to respiratory nerve paralysis and lead to death.