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Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) are fully or partly halogenated hydrocarbons that contain carbon (C), hydrogen (H), chlorine (Cl), and fluorine (F), produced as volatile derivatives of methane, ethane, and propane. The most common example is dichlorodifluoromethane (R-12). R-12 is also commonly called Freon and ...
Abundances are given as pollution free monthly mean mole fractions in parts-per-trillion. Atmospheric concentration of CFC-113 since year 1992. CFC-113 is a very unreactive chlorofluorocarbon. It remains in the atmosphere about 90 years, [9] sufficiently long that it will cycle out of the troposphere and into the stratosphere.
Pages in category "Chlorofluorocarbons" The following 14 pages are in this category, out of 14 total. This list may not reflect recent changes. ...
Trichlorofluoromethane was first widely used as a refrigerant.Because of its high boiling point compared to most refrigerants, it can be used in systems with a low operating pressure, making the mechanical design of such systems less demanding than that of higher-pressure refrigerants R-12 or R-22.
1,2-Dichlorotetrafluoroethane, or R-114, also known as cryofluorane , is a chlorofluorocarbon (CFC) with the molecular formula ClF 2 CCF 2 Cl. Its primary use has been as a refrigerant. It is a non-flammable gas with a sweetish, chloroform-like odor with the critical point occurring at 145.6 °C and 3.26 MPa. When pressurized or cooled, it is a ...
(Reuters) - Robert F. Kennedy Jr., who heads the Department of Health and Human Services, has said U.S. President Donald Trump will call for an end to adding fluoride to public water supplies ...
For example, regulatory bodies could require washing machines to include filters that catch microplastics coming from clothing. Or even better, clothing manufacturers could use less plastic, she says.
Chemical nomenclature, replete as it is with compounds with very complex names, is a repository for some names that may be considered unusual. A browse through the Physical Constants of Organic Compounds in the CRC Handbook of Chemistry and Physics (a fundamental resource) will reveal not just the whimsical work of chemists, but the sometimes peculiar compound names that occur as the ...