Cryofluoran
Structural formula | ||||||||||||||||
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Wedges to clarify the geometry | ||||||||||||||||
General | ||||||||||||||||
Surname | Cryofluoran | |||||||||||||||
other names |
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Molecular formula | C 2 Cl 2 F 4 | |||||||||||||||
Brief description |
non-flammable colorless odorless gas (at high concentration with a sweetish chloroform-like odor) |
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properties | ||||||||||||||||
Molar mass | 170.92 g mol −1 | |||||||||||||||
Physical state |
gaseous |
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density |
7.67 kg m −3 (gaseous, 0 ° C) |
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Melting point |
−94 ° C |
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boiling point |
3.6 ° C |
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Vapor pressure |
182 k Pa (20 ° C) |
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solubility |
very bad in water (110 mg l −1 ) |
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Refractive index |
1.3092 (0 ° C) |
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safety instructions | ||||||||||||||||
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MAK |
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Global warming potential |
9615 (based on 100 years) |
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Thermodynamic properties | ||||||||||||||||
ΔH f 0 |
−937.0 kJ / mol |
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C |
Cryofluoran is a chemical compound from the group of chlorofluorocarbons (CFC), which was mainly used as a refrigerant and as a propellant for spray cans . Under pressure or when cooled, the gas is a colorless liquid. It is on the list of climate-damaging gases of the Intergovernmental Panel on Climate Change .
use
In addition to being a refrigerant, Cryofluoran was used as a foaming agent for fire extinguishers and foams and as a solvent and cleaning agent in the electronics industry. Another area of application is the isolation of highly stressed probe heads in measurement technology .
safety instructions
As with all CFCs, the decomposition (through intense heat) of Cryofluoran forms corrosive and toxic substances ( hydrochloric acid , hydrofluoric acid ).
Individual evidence
- ↑ a b c d e f g h Entry on Cryofluoran in the GESTIS substance database of the IFA , accessed on February 1, 2016(JavaScript required) .
- ↑ David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Physical Constants of Organic Compounds, pp. 3-160.
- ↑ Data sheet 1,2-dichlorotetrafluoroethane from Sigma-Aldrich , accessed on May 7, 2015 ( PDF ).
- ↑ Swiss Accident Insurance Fund (Suva): Limit values - current MAK and BAT values (search for 76-14-2 or Cryofluoran ), accessed on November 2, 2015.
- ↑ G. Myhre, D. Shindell et al .: Climate Change 2013: The Physical Science Basis . Working Group I contribution to the IPCC Fifth Assessment Report. Ed .: Intergovernmental Panel on Climate Change . 2013, Chapter 8: Anthropogenic and Natural Radiative Forcing, pp. 24-39; Table 8.SM.16 ( PDF ).
- ↑ David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Standard Thermodynamic Properties of Chemical Substances, pp. 5-21.
- ↑ Fluoride Action Network Pesticide Project: Dichlorotetrafluoroethane (76-14-2)
- ↑ amplifier.cd: P6015A High Voltage Probe