Concentrations of hydrogen sulfide of greater than 500 ppm are expected to cause what clinical effects?
Coma, cardiovascular collapse and pulmonary edema occur with hydrogen sulfide concentrations greater than 500 ppm. The classic rotten egg odor is identifiable at concentrations as low as 0.02 ppm.
Resiere D et al. Sargassum seaweed health menace in the Caribbean: clinical characteristics of a population exposed to hydrogen sulfide during the 2018 massive stranding. Clin Tox 2020; published online 7 Jul 2020. https://doi.org/10.1080/15563650.2020.1789162