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Hydrogen sulfide is toxic to humans and most ... levels of hydrogen sulfide as high as 83 ppm ... until urine tests revealed that hydrogen sulfide was the cause of ...
Causes: Sulfur medications such as phenacetin, metoclopramide, dapsone, phenzopyridine, and trimethoprim-sulfamethoxazole; hydrogen-sulfide-producing intestinal bacteria, such as Morganella morganii: Risk factors: Pulmonary arteriovenous malformation: Prevention: Avoidance of sulfur-containing compounds including drugs: Treatment: Blood ...
Prolonged low-level exposure may cause fatigue, pneumonia, loss of appetite, headaches, irritability, poor memory, and dizziness. High concentrations of hydrogen sulfide (>150 ppm) can produce olfactory fatigue, whereby the scent becomes undetectable. At higher concentrations (>300 ppm), hydrogen sulfide can cause loss of consciousness and death.
Highly Toxic: a gas that has a LC 50 in air of 200 ppm or less. [2] NFPA 704: Materials that, under emergency conditions, can cause serious or permanent injury are given a Health Hazard rating of 3. Their acute inhalation toxicity corresponds to those vapors or gases having LC 50 values greater than 1,000 ppm but less than or equal to 3,000 ppm ...
Hydrogen sulfide is also a potent cellular toxin, blocking the cytochrome system and inhibiting cellular respiration. More water-soluble gases (e.g. chlorine, ammonia, sulfur dioxide, hydrogen chloride) dissolve in the upper airway and immediately cause mucous membrane irritation, which may alert people to the need to escape the exposure.
The term immediately dangerous to life or health (IDLH) is defined by the US National Institute for Occupational Safety and Health (NIOSH) as exposure to airborne contaminants that is "likely to cause death or immediate or delayed permanent adverse health effects or prevent escape from such an environment." Examples include smoke or other ...
Hydrogen cyanide, a highly toxic gas, can be fatal depending on the dose and length of exposure. Benzene is known to cause cancers such as leukemia, multiple myeloma and non-Hodgkin lymphoma in ...
Three candidate gasotransmitters, nitric oxide, carbon monoxide, and hydrogen sulfide, have ironically been discarded as useless toxic gases throughout history. These molecules are a classic example of dose-dependent hormesis such that low-dose is beneficial whereas absence or excessive dosing is toxic.