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Chlorofluoromethane

Names
Preferred IUPAC name Chloro(fluoro)methane
Other names Chlorofluoromethane Fluorochloromethane Chloro-fluoro-methane Methylene chloride fluoride Monochloromonofluoromethane CFM Khladon 31 Freon 31 HCFC 31 R 31
Identifiers
CAS Number	593-70-4
3D model (JSmol)	Interactive image
ChemSpider	11153
ECHA InfoCard	100.008.914
EC Number	209-803-2
KEGG	C19362
PubChem CID	11643
UNII	CUM8OUO53E
CompTox Dashboard (EPA)	DTXSID6020305
InChI InChI=1S/CH2ClF/c2-1-3/h1H2Key: XWCDCDSDNJVCLO-UHFFFAOYSA-N InChI=1/CH2ClF/c2-1-3/h1H2Key: XWCDCDSDNJVCLO-UHFFFAOYAV
SMILES C(F)Cl
Properties
Chemical formula	CH2ClF
Molar mass	68.48 g/mol
Appearance	Gas
Density	1.271 kg/m at 20 °C
Melting point	−133.0 °C (−207.4 °F; 140.2 K)
Boiling point	−9.1 °C (15.6 °F; 264.0 K)
Henry's law constant (kH)	0.15 mol.kg.bar
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	Carc. Cat. 3
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). N verify (what is  ?) Infobox references

Chlorofluoromethane or Freon 31 is the hydrochlorofluorocarbon (HCFC) with the formula CH₂ClF. It is a colorless, odorless, flammable gas. It is a class II ozone depleting substance and in accordance with the montreal protocol, its production and import were banned on 1 January 2015.

Uses

Pyrolysis of a mixture of dichlorofluoromethane and chlorofluoromethane gives hexafluorobenzene:

3 CHCl₂F + 3 CH₂ClF → C₆F₆ + 9 HCl

It was used as a refrigerant and has an ozone depletion potential of 0.02.

Additional data

Its crystal structure is monoclinic with space group P2₁ and lattice constants a = 6.7676, b = 4.1477, c = 5.0206 (0.10 nm), β = 108.205°.

At an altitude of 22 km, traces of chlorofluoromethane occur (148 ppt).

References

1. ^ Dagani, M. J.; Barda, H. J.; Benya, T. J.; Sanders, D. C. "Bromine Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a04_405. ISBN 978-3527306732.
2. US EPA, OAR (22 July 2015). "Phaseout of Class II Ozone-Depleting Substances". www.epa.gov. Retrieved 29 August 2024.
3. Binbrek O. S.; Torrie B. H.; Swainson I. P. (2002). "Neutron powder-profile study of chlorofluoromethane". Acta Crystallographica C. 58 (11): 672–674. doi:10.1107/S0108270102017328. PMID 12415178. S2CID 6646254.
4. C. Lippens; et al. (1981). "Atmospheric nitric acid and chlorofluoromethane 11 from interferometric spectra obtained at the Observatoire du Pic du Midi". Journal of Optics. 12 (5): 331–336. Bibcode:1981JOpt...12..331L. doi:10.1088/0150-536X/12/5/007.

External links

• Thermochemical table at chemnet.ru
• Infrared Spectrum of Chlorofluoromethane
• IARC Summaries & Evaluations: Vol. 41 (1986), Vol. 71 (1999)

• Hydrochlorofluorocarbons
• Halomethanes
• Refrigerants
• IARC Group 3 carcinogens
• Ozone-depleting chemical substances