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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.



(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.

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.
Sistemas estudiados Modelo Tipo de datos Dioxido de Carbono+ PR/WS P-T-x [Bmim][N[O.sub.3]]; [Bmim][BF4]; [Bmim][DCA]; [Bmim][TFO]; [Bmim][methide]; [Bmim][T[f.sub.2]N]; [hmim][T[f.sub.2]N]; [hmim][T[f.sub.2]N] Amoniaco+ PR/KM P-T-x [Bmim][PF6]; [Bmim][BF4]; [C2mim][BF4]; [C6mim][BF4]; [C8mim][BF4]; [DMEA][Ac]; [emim][T[f.sub.2]N]; [hmim][C1] R-23 + [Bmim][PF6]; R-32+ [Bmim][BF4]; PR/KM P-T-x R-32+ [Bmim][PF6]; R-32+ [Bmim][HFPS]; R-32+ [Bmim][TFES]; R-32+ [Bmim][TTES]; R-32+ [Emim][TFES];R-32+ [Emim][BEI] R-125 + [Bmim][PF6]; R-134a + [Bmim][PF6]; R-143a + [Bmim][PF6]; R-152a + [Bmim][PF6] Sistemas estudiados No.
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
Tenders are invited for Refrigeration Gas R-23 With Returnable Cylinders Of 5 Kg
petersburg km 624 + 550 (at the intersection with pelgorskoye highway, ryabovo settlement), leningrad region, m-9 baltija moscow-volokolamsk-gran with the republic of latvia, km 450 + 000 - km 485 + 000, pskov region (stage 1), r-23 st.
Tender notice number : 404/8A/17-18 Date 06-04-17 (R-23) ID:2017_CEKNP_41061_1
Tenders are invited for Providing and fixing missing and damaged of informatory board on East of Kailash and Alaknanda area in connection with Annual repair & Maintenance Operation to various roads under Sub Division South East R-23 during 2016-17