The National Institute for Occupational Safety and Health (NIOSH) estimated that 1 million workers may be exposed to methylene chloride. These exposure levels exceed the current recommended federal limits. In the past, concentrations ranging from 1 to 1,000 parts of methylene chloride per million parts of air (ppm 1 ppm is 1,000 times more than 1 ppb) have been detected in general work areas, while higher concentrations (1,400 ppm) have been detected in samples in the breathing zone of some workers. People who work with it can breathe in the chemical or it may come in contact with their skin. The highest and most frequent exposures to methylene chloride usually occur in workplaces where the chemical is used exposure can be dangerously high if methylene chloride is used in an enclosed space without adequate ventilation. ![]() Exposure occurs as a result of breathing the vapors given off by the product or from direct contact of the liquid material with the skin. Contact with consumer products such as paint strippers or aerosol cans that contain methylene chloride is another frequent source of exposure. cities ranges from 33 to 309 micrograms per day (1 milligram is equivalent to 1,000 micrograms, 1 mg = 1,000 μg.). The average daily intake of methylene chloride from outdoor air in three U.S. Methylene chloride has been found in some urban air and at some hazardous waste sites at average concentrations of 11 ppb of air. Background levels in air are usually at less than one part methylene chloride per billion parts (ppb) of air. Because methylene chloride evaporates easily, the greatest potential for exposure is when you breathe vapors of contaminated air. You may be exposed to methylene chloride in air, water, food, or from consumer products. How might I be exposed to methylene chloride? We do not expect methylene chloride to build up in plants or animals. We do not know how long it remains in soil. ![]() When methylene chloride is spilled on land, it attaches loosely to nearby surface soil particles. It takes about 1 to 6 days for half the methylene chloride to break down in water. Over 90% of the methylene chloride in the environment changes to carbon dioxide (CO 2), which is already present in air. Methylene chloride that is present in water is broken down slowly by reactions with other chemicals or by bacteria. Although methylene chloride does not dissolve easily in water, small amounts may be found in some drinking water. About half of the methylene chloride disappears from air in 53 to 127 days. In the air, it is broken down by sunlight and by reaction with other chemicals present in the air. Because methylene chloride evaporates readily, most of it is released into the air. Many chemical waste sites, including NPL sites, contain methylene chloride and these might act as additional sources of environmental contamination through spills, leaks, or evaporation. ![]() Methylene chloride is mainly released to the environment in air, and to a lesser extent in water and soil, due to industrial and consumer uses. What happens to methylene chloride when it enters the environment? Industries and the use of aerosol products and paint Results from its use as an end product by various Methylene chloride released to the environment Methylene chloride does not appear to occur TheĬhemical may be found in some spray paints,Īutomotive cleaners, and other household products. It can be found inĬertain aerosol and pesticide products and is used in Mild sweet odor, evaporates easily, and does notīurn easily. For more information, call the ATSDR Information Center at 1-80.ĭichloromethane, is a colorless liquid that has a The effects of exposure to any hazardous substance depend on the dose, the duration, how you are exposed, personal traits and habits, and whether other chemicals are present. This information is important because this substance may harm you. A shorter version, the ToxFAQs TM, is also available. It is one in a series of Public Health Statements about hazardous substances and their health effects. This Public Health Statement is the summary chapter from the Toxicological Profile for Methylene Chloride. Public Health Statement for Methylene Chloride What recommendations has the federal government made to protect human health?.Is there a medical test to determine whether I have been exposed to methylene chloride?.How can families reduce the risk of exposure to methylene chloride?. ![]() How can methylene chloride affect children?.How can methylene chloride affect my health?.How can methylene chloride enter and leave my body?.How might I be exposed to methylene chloride?.What happens to methylene chloride when it enters the environment?.
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