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Toxic: a chemical that has a median lethal concentration (LC 50) in air of more than 200 parts per million (ppm) but not more than 2,000 parts per million by volume of gas or vapor, or more than 2 milligrams per liter but not more than 20 milligrams per liter of mist, fume or dust, when administered by continuous inhalation for 1 hour (or less if death occurs within 1 hour) to albino rats ...
Lead is the most prevalent heavy metal contaminant. [24] As a component of tetraethyl lead, (CH 3 CH 2) 4 Pb, it was used extensively in gasoline during the 1930s–1970s. [25] Lead levels in the aquatic environments of industrialised societies have been estimated to be two to three times those of pre-industrial levels. [26]
Aftermath of the 2020 Beirut explosion.. The most dangerous chemical accident recorded in history was the 1984 Bhopal gas tragedy in India, in which more than 3,000 people died after highly toxic methyl isocyanate was released at a Union Carbide pesticides factory.
Researchers using high-tech air monitoring equipment rolled through an industrialized stretch of southeast Louisiana in mobile labs and found levels of a carcinogen in concentrations as much as 20 ...
There have been many extremely large explosions, accidental and intentional, caused by modern high explosives, boiling liquid expanding vapour explosions (BLEVEs), older explosives such as gunpowder, volatile petroleum-based fuels such as gasoline, and other chemical reactions. This list contains the largest known examples, sorted by date.
The chemicals have been connected to reduced fertility, immune function and certain cancers. Dangerous ‘forever chemicals’ can be destroyed with ‘promising’ new tech, study says Skip to ...
To date it is rated as the world's worst offshore oil disaster in terms both of lives lost and impact to industry. March 24, 1989: Exxon Valdez oil spill . The Exxon Valdez , an oil tanker bound for Long Beach, California , hit Prince William Sound 's Bligh Reef , dumping an estimated minimum 10.8 million US gallons (40.9 million litres, or ...
Strong acids and alkalis used in manufacturing and industrial production. They can destroy tissue and cause internal damage to the body. The most overlooked toxic and hazardous wastes are the household products in everyday homes that are improperly disposed of such as old batteries, pesticides, paint, and car oil. Toxic waste can be reactive ...