Difluoromethane
- Formula: CH2F2
- Molecular weight: 52.0234
- IUPAC Standard InChI: InChI=1S/CH2F2/c2-1-3/h1H2
- IUPAC Standard InChIKey: RWRIWBAIICGTTQ-UHFFFAOYSA-N
- CAS Registry Number: 75-10-5
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
View 3d structure (requires JavaScript / HTML 5) - Other names: Freon 32; Methane, difluoro-; Methylene fluoride; Carbon fluoride hydride; Genetron 32; Methylene difluoride; CH2F2; R 32; HFC 32; R 32 (refrigerant)
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Critical density
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
| ρc (mol/l) | Reference | Comment |
|---|---|---|
| 8.17 | Shi, Zhu, et al., 1998 | Uncertainty assigned by TRC = 0.08 mol/l; TRC |
| 8.36 | Fu, Han, et al., 1995 | Uncertainty assigned by TRC = 0.1 mol/l; TRC |
| 8.21 | Higashi, 1995 | Uncertainty assigned by TRC = 0.1 mol/l; TRC |
| 8.15 | Kuwabara, Aoyama, et al., 1995 | Uncertainty assigned by TRC = 0.04 mol/l; TRC |
| 8.23 | Higashi, 1994 | Uncertainty assigned by TRC = 0.1 mol/l; TRC |
| 8.2367 | Holcomb, Niesen, et al., 1993 | Uncertainty assigned by TRC = 0.02 mol/l; TRC |
| 8.27 | Malbrunot, Meunier, et al., 1968 | Uncertainty assigned by TRC = 0.1 mol/l; TRC |
References
Go To: Top, Critical density, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Shi, Zhu, et al., 1998
Shi, L.; Zhu, M.; Han, L.; Duan, Y.; Sun, L.; Fu, Y.-D.,
Thermophysical Properties of Difluoromethane (HFC-32),
Science in China, Ser. E, 1998, 41, 435-42. [all data]
Fu, Han, et al., 1995
Fu, Y.D.; Han, L.-Z.; Zhu, M.-S.,
PVT properties, vapor pressures and critical parameters of HFC-32,
Fluid Phase Equilib., 1995, 111, 273-86. [all data]
Higashi, 1995
Higashi, Y.,
Vapor-liquid equilibrium, coexistence curve, and critical locus for binary HFC-32/HFC-134a mixture,
Int. J. Thermophys., 1995, 16, 1175-84. [all data]
Kuwabara, Aoyama, et al., 1995
Kuwabara, S.; Aoyama, H.; Sato, H.; Watanabe, K.,
Vapor-liquid coexistence curves in the critical region and the critical temperatures and densities of difluoromethane and pentafluoroehtane,
J. Chem. Eng. Data, 1995, 40, 112-116. [all data]
Higashi, 1994
Higashi, Y.,
Critical parameters for HFC134a, HFC32 and HFC125,
Int. J. Refrig., 1994, 17, 524-531. [all data]
Holcomb, Niesen, et al., 1993
Holcomb, C.D.; Niesen, V.G.; Van Poolen, L.J.; Outcalt, S.L.,
Coexisting densities , vapor pressures and critical densities of refrigerants R-32 and R-152a, at 300-385 K,
Fluid Phase Equilib., 1993, 91, 145-57. [all data]
Malbrunot, Meunier, et al., 1968
Malbrunot, P.F.; Meunier, P.A.; Scatena, Georges M.; Mears, Whitney H.; Murphy, Kevin Paul.; Sinka, Joseph V.,
Pressure-volume-temperature behavior of difluoromethane,
J. Chem. Eng. Data, 1968, 13, 1, 16-21, https://doi.org/10.1021/je60036a006
. [all data]
Notes
Go To: Top, Critical density, References
- Symbols used in this document:
ρc Critical density - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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