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(organic chemistry)
CHF3 A colorless, nonflammable gas, boiling point 84°C at 1 atmosphere (101,325 pascals), freezing point 160°C at 1 atmosphere; used in refrigeration and as an intermediate in organic synthesis. Also known as propellant 23; refrigerant 23; trifluoromethane.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(trifluoromethane), CHF3, a colorless gas, with a boiling point of –82.5°C. Unlike chloroform, fluoroform is an inert compound; for example, it is resistant to the action of alkalies. It is prepared from chloroform by an exchange reaction with SbF3 or HF or from chlorotrifluoromethane (Freon-13) and H2, as well as by other methods. It is used as a refrigerant.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Using REFPROP, R-23 and R-134a are analyzed at various state points to determine the optimum operating points to reach -80[degrees]C (-112[degrees]F) for the ideal mixed refrigerant cycle design.
Following compression, the vapor mixture of R-23 and R-134a enters a water cooled condenser (state 2) and is condensed at constant pressure.
Because the water cooled separator removes only enough energy to condense all of the R-134a to a saturated liquid; the R-23 exits the separator as superheated vapor.
It is assumed that the R-23 exiting the heat exchanger at state 7 in Figure 4 is completely condensed to a saturated liquid state.
The model predicted that the evaporator would reach a temperature of -87[degrees]C (-124.6 [degrees]F) under these conditions, but assumed perfect separation of the R-23 and R-134a streams exiting the separator.
The analysis predicts that the refrigeration system can reach the target evaporator inlet temperature of -87 [degrees]C (-124.6 [degrees]F) using a mixture of 33.4% R-23 and 66.6% R-134a by mass.
Ozone Global Ct Boiling Depletion Warming ([degrees] Temperature Potential Potential C) ([degrees]C) R-22 0.055 1,700 96 -41 R-23 0 12,000 26 -82 R-134a 0 1,300 101 -26 R-404A 0 3,780 73 -47 R-410A 0 1,980 72 -51 R-717 0 0 133 -33