Upper respiratory tract irritation

Symptoms of upper respiratory tract mucosal irritation are common with hydrogen sulfide poisoning. Hydrogen sulfide is a colorless gas that is irritating and choking. Low-level exposure has only local irritation of the respiratory tract and eyes. At high concentrations, the systemic effect is more pronounced, with symptoms of central nervous system and asphyxia. Hydrogen sulfide has a "smelly egg-like" odor, but extremely high concentrations quickly cause olfactory fatigue without feeling its taste. Mining, smelting, sugar beet making, carbon disulfide, organophosphorus pesticides, and leather, sulfur dyes, pigments, animal glues and other industries have hydrogen sulfide production; organic matter corruption places such as swamps, ditches, septic tanks, dirt deposition A large amount of hydrogen sulfide can escape during operation in ponds and other places, and poisoning by workers is not uncommon.