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Dichlorodifluoromethane (R-12) is a colorless gas popularly known by the genericized brand name Freon (as Freon-12). It is a chlorofluorocarbon halomethane (CFC) used as a refrigerant and aerosol spray propellant .
International Chemical Safety Card 1106; NIOSH Pocket Guide to Chemical Hazards. "#0197". National Institute for Occupational Safety and Health (NIOSH). Termochemistry data at chemnet.ru; Entry at Air Gas Liquide Encyclopaedia Archived 2021-02-18 at the Wayback Machine
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 ...
An easy example is that of CFC-12, which gives: 90+12=102 -> 1 carbon, 0 hydrogens, 2 fluorine atoms, and hence 2 chlorine atoms resulting in CCl 2 F 2. The main advantage of this method of deducing the molecular composition in comparison with the method described in the paragraph above is that it gives the number of carbon atoms of the molecule.
The use of personal protective equipment may substantially reduce the risk of adverse health effects from contact with hazardous materials. [2] Long-term exposure to chemical hazards such as silica dust, engine exhausts, tobacco smoke, and lead (among others) have been shown to increase risk of heart disease, stroke, and high blood pressure. [3]
There are also mental health effects, according to Siegel. A 10-year study in Nature Mental Health showed a "significant mental health impact" on Californians exposed to wildfires, the doctor ...
Chlorotrifluoromethane, R-13, CFC-13, or Freon 13, is a non-flammable, non-corrosive, nontoxic chlorofluorocarbon (CFC) and also a mixed halomethane.It is a man-made substance used primarily as a refrigerant.
These biological agents can cause adverse health effects in workers. Influenza is an example of a biological hazard which affects a broad population of workers. [14] Exposure to toxins generated by insects, spiders, snakes, scorpions, [15] [16] [17] etc., require physical contact be made between the worker and the living organism.