Norflurane

Formula: C₂H₂F₄
Molecular weight: 102.0309
IUPAC Standard InChI: InChI=1S/C2H2F4/c3-1-2(4,5)6/h1H2
IUPAC Standard InChIKey: LVGUZGTVOIAKKC-UHFFFAOYSA-N
CAS Registry Number: 811-97-2
Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript.
Other names: 1,1,1,2-Tetrafluoroethane; Ethane, 1,1,1,2-tetrafluoro-; Norfluran; R 134a; 1,2,2,2-Tetrafluoroethane; CF3CH2F; HFA-134a
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Critical pressure

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Data compiled by: Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director

P_c (bar)	Reference	Comment
40.481	Fujiwara, Nakamura, et al., 1998	Uncertainty assigned by TRC = 0.05 bar; 3 measurements made to check accuracy of technique, includes review of and comparison with previous literature; TRC
40.482	Fujiwara, Nakamura, et al., 1998	Uncertainty assigned by TRC = 0.03 bar; 3 measurements made to check accuracy of technique, includes review of and comparison with previous literature; TRC
40.478	Fujiwara, Nakamura, et al., 1998	Uncertainty assigned by TRC = 0.05 bar; 3 measurements made to check accuracy of technique, includes review of and comparison with previous literature; TRC
40.54	Economou, Peters, et al., 1995	Uncertainty assigned by TRC = 0.08 bar; TRC
40.52	Higashi, 1994	Uncertainty assigned by TRC = 0.09 bar; TRC
40.551	Goodwin, Defibaugh, et al., 1992	Uncertainty assigned by TRC = 0.02 bar; Calc. from vapor pressure eq. fit to data at selected critical temperature; TRC
40.680	Morrison and Ward, 1991	Uncertainty assigned by TRC = 0.10 bar; TRC
40.55	Fukushima, Watanabe, et al., 1990	Uncertainty assigned by TRC = 0.06 bar; TRC
40.29	Nishiumi and Yokoyama, 1990	Uncertainty assigned by TRC = 0.06 bar; TRC
40.640	Piao, Sato, et al., 1990	Uncertainty assigned by TRC = 0.10 bar; Calculated vapor pressure equation fit to obs. data at the selected critical temperature (374.30 K); TRC
40.67	Basu and Wilson, 1989	Uncertainty assigned by TRC = 0.027 bar; TRC
40.65	Yamashita, Kubota, et al., 1989	Uncertainty assigned by TRC = 0.08 bar; TRC
40.67	Wilson and Basu, 1988	Uncertainty assigned by TRC = 0.10 bar; Calc. from vapor pressure equation fit to data, at the critical temperature.; TRC

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:

References

Go To: Top, Critical pressure, Notes

Fujiwara, Nakamura, et al., 1998
Fujiwara, K.; Nakamura, S.; Noguchi, M., Critical Parameters and Vapor Pressure Measurements for 1,1,1-Trifluoroethane (R-143a), J. Chem. Eng. Data, 1998, 43, 55-9. [all data]

Economou, Peters, et al., 1995
Economou, I.G.; Peters, C.J.; Florusse, L.J.; De Swaan Arons, J., Phase behavior of the binary refrigerant mixture chlorodifluoro-ethane (R22 )-1,1,1,2-tetrafluoro-ethane (R134a): experimental investigation and theoretical modeling using the perturbed-anisotropic-c, Fluid Phase Equilib., 1995, 111, 239-52. [all data]

Higashi, 1994
Higashi, Y., Critical parameters for HFC134a, HFC32 and HFC125, Int. J. Refrig., 1994, 17, 524-531. [all data]

Goodwin, Defibaugh, et al., 1992
Goodwin, A.R.H.; Defibaugh, D.R.; Weber, L.A., The vapor pressure of 1,1,1,2-tetrafluoroethane (R134a) and chlorodifluoromethane (R22), Int. J. Thermophys., 1992, 13, 837-54. [all data]

Morrison and Ward, 1991
Morrison, G.; Ward, D., Thermodynamic properties of two alternative refrigerants: 1,1-dichloro-2,2, 2-trifluoroethane (R123) and 1,1,1,2- tetrafluoroethane (R134a), Fluid Phase Equilib., 1991, 62, 65-86. [all data]

Fukushima, Watanabe, et al., 1990
Fukushima, M.; Watanabe, N.; Kamimura, T., Measurements of the PVT properties of HCFC123 and HFC134a, Nippon Reito Kyokai Ronbunshu, 1990, 7, 243-56. [all data]

Nishiumi and Yokoyama, 1990
Nishiumi, H.; Yokoyama, T., Vapor-Liquid equilibrium for the system of R134a-R22 in Proc. Symp. Thermophys. Prop., 11th, Tokyo, Japan, p 95, 1990. [all data]

Piao, Sato, et al., 1990
Piao, C.C.; Sato, H.; Watanabe, K., An experimental study for PVT properties of CFC alternative refrigerant 1,1 ,1,2-tetrafluoroethane (R-134a), ASHRAE Trans., 1990, 96, 132-140. [all data]

Basu and Wilson, 1989
Basu, R.S.; Wilson, D.P., Thermophysical properties of 1,1,1,2-Tetrafluoroethane (R-134a), Int. J. Thermophys., 1989, 10, 591-603. [all data]

Yamashita, Kubota, et al., 1989
Yamashita, T.; Kubota, H.; Tanaka, Y.; Makita, T.; Kashiwagi, H., Physical properties of new halogenated hydrocarbons, Proc. Symp. Thermophys. Prop. 10th, 1989,, 1989, p 75-8. [all data]

Wilson and Basu, 1988
Wilson, D.P.; Basu, R.S., Thermodynamic properties of a new stratospherically safe working fluid- refrigerant 134A, ASHRAE Trans., 1988, 94, 2095-2118. [all data]

Notes

Go To: Top, Critical pressure, References

Symbols used in this document:

P_c Critical pressure
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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