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Selenium is still used in a few types of DC power surge protectors and one type of fluorescent quantum dot. Although trace amounts of selenium are necessary for cellular function in many animals, including humans, both elemental selenium and (especially) selenium salts are toxic in even small doses, causing selenosis. [11]
Selenium is an essential micronutrient for animals, though it is toxic in large doses. In plants, it sometimes occurs in toxic amounts as forage , e.g. locoweed . Selenium is a component of the amino acids selenocysteine and selenomethionine .
These elements include vanadium, manganese, iron, cobalt, copper, zinc, selenium, strontium and molybdenum. [75] A deficiency of these essential metals may increase susceptibility to heavy metal poisoning. [76] Selenium is the most toxic of the heavy metals that are essential for mammals. [77]
Hydrogen selenide is hazardous, being the most toxic selenium compound [3] and far more toxic than its congener hydrogen sulfide. The threshold limit value is 0.05 ppm. The gas acts as an irritant at concentrations higher than 0.3 ppm, which is the main warning sign of exposure; below 1 ppm, this is "insufficient to prevent exposure", while at ...
Selenium is toxic in high concentrations. As sodium selenite, the chronic toxic dose for human beings was described as about 2.4 to 3 milligrams of selenium per day. [7] In 2000, the US Institute of Medicine set the adult Tolerable upper intake levels (UL) for selenium from all sources - food, drinking water and dietary supplements - at 400 μg/day. [8]
Prato added that oxybenzone and octinoxate should be avoided due to their toxic effects on marine ecosystems. ... such as vitamins C, E, and A, zinc, selenium, beta carotene, omega-3 fatty acids, ...
Selenium compounds are compounds containing the element selenium (Se). ... It is a strongly odiferous, toxic, and colorless gas. It is more acidic than H 2 S.
Other heavy metals noted for their potentially hazardous nature, usually as toxic environmental pollutants, include manganese (central nervous system damage); [62] cobalt and nickel (carcinogens); [63] copper, [64] zinc, [65] selenium [66] and silver [67] (endocrine disruption, congenital disorders, or general toxic effects in fish, plants ...