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Hydrofluoric acid severe and sometimes delayed health effects are due to deep tissue penetration by the fluoride ion. The surface area of the burn is not predictive of its effects. Most hydrogen fluoride exposures occur by inhalation of the gas and dermal contact with hydrofluoric acid.
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Synonyms include formalin, formic aldehyde, methanal, methyl aldehyde, methylene oxide, oxomethane, and paraform. There is no antidote for formaldehyde, but its effects can be treated, and most exposed persons get well. Patients who have had a serious exposure (with signs and symptoms such as tearing eyes, running nose, or severe or persistent coughing) may need to be hospitalized.
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Hydrogen sulfide is a very rapidly acting, highly toxic gas that can produce rapid CNS and respiratory depression. It is also an irritant affecting skin and mucous membranes. There is no proven antidote for hydrogen sulfide poisoning. Treatment generally consists of support of respiratory and cardiovascular functions
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Phenol is corrosive and causes severe chemical burns on contact. Systemic effects can occur from all routes of exposure. There is no antidote for phenol. Rapid decontamination may greatly affect the odds of survival. Treatment consists of support of respiratory and cardiovascular functions.
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Most exposures are due to air pollution, and this has both short-term and chronic health consequences for people with lung disease. Exposures of 10 to 20 ppm cause irritation to mucous membranes. Direct contact with escaping compressed gas or liquid sulfur dioxide can produce severe corneal damage and frostbite injury to the skin.
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Acrolein is a clear, colorless, or yellow liquid with a pungent, suffocating odor. It is very flammable and may polymerize violently.
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At room temperature, acrylonitrile is a clear, colorless, or slightly yellow liquid. It is very volatile, producing flammable and toxic air concentrations at room temperature and may explode.
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At room temperature, anhydrous ammonia is a colorless, highly irritating gas with a pungent, suffocating odor. It is lighter than air and flammable, with difficulty, at high concentrations and temperatures. It is easily compressed and forms a clear, colorless liquid under pressure.
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Ethylene oxide is a colorless gas at room temperature and a colorless liquid below 51ºF (10.7ºC). It is shipped as a liquefied, compressed gas. Both the gas and liquid are potential fire and explosion hazards.
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At room temperature (above 43ºF), methyl mercaptan is a colorless gas with an unpleasant odor described as rotten cabbage.
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At room temperature, methylene chloride is a clear, colorless liquid with a pleasant odor. It is volatile, producing potentially toxic concentrations at room temperature.
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At room temperature, malathion is a yellow to deep brown liquid with an odor of garlic. It is a solid below 37ºF. It is often dissolved in a hydrocarbon solvent before use.
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Lewisite is an organic arsenical known for its vesicant properties. Pure Lewisite is an oily, colorless liquid, while impure Lewisite is amber to black.
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Nitrogen mustards are vesicants and alkylating agents. They are colorless to pale yellow, oily liquids that evaporate slowly. HN-1 has a faint, fishy or musty odor.
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Sulfur mustards are vesicants and alkylating agents. They are colorless when pure but are typically a yellow to brown oily substance with a slight garlic or mustard odor.
www.atsdr.cdc.gov