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A promising alternative to CFC-113.

A promising alternative to CFC-113

CFC-113, or trichlorotrifluoroethane, is a solvent commonly used for degreasing and cleaning, especially in the electronics industry. As part of the montreal Protocol (SN: 6/10/89, p. 367), the United States and several other nations are phasing out production of this chlorofluorocarbon, the culprit behind an estimated 4 percent of the human-generated chlorine now damaging Earth's protective ozone layer. And that's why U.S. firms that reported emitting a ton or more of this pollutant annually (in EPA's first Toxic Release Inventory, published earlier this month) express excitement about new test data on Genesolv 2010, the trade name for a mix of HCFC-123 and HCFC-141b. Last month, EPA announced that a panel of 230 industrial and government researchers identified this experimental degreaser as the first potential CFC-113 substitute that performs as well or better but poses less environmental threat.

Like CFC-113, the hydrofluorocarbons in Genesolv 2010, would release chlorine. But because they would remain in the stratosphere for far shorter periods, "the amount they contribute would be minuscule compared to CFC-113," comments atmospheric chemist Michael Prather at NASA's Goddard Institute for Space Studies in New York City.
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Title Annotation:chlorofluorocarbon
Publication:Science News
Date:Feb 3, 1990
Words:193
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