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^N

3D model (JSmol)

Interactive image

ChemSpider

11153^Y

ECHA InfoCard

100.008.914

EC Number

209-803-2

KEGG

C19362^N

PubChem CID

11643

UNII

CUM8OUO53E^Y

CompTox Dashboard (EPA)

DTXSID6020305

InChI

InChI=1S/CH2ClF/c2-1-3/h1H2^Y
Key: XWCDCDSDNJVCLO-UHFFFAOYSA-N^Y
InChI=1/CH2ClF/c2-1-3/h1H2
Key: XWCDCDSDNJVCLO-UHFFFAOYAV

SMILES

C(F)Cl

Properties

Chemical formula

CH₂ClF

Molar mass

68.48 g/mol

Appearance

Gas

Density

1.271 kg/m³ 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 (k_H)

0.15 mol.kg⁻¹.bar⁻¹

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 [77 °F], 100 kPa).

N verify (what is ^YN ?)

Infobox references

Chemical compound

Chlorofluoromethane or Freon 31 is the hydrochlorofluorocarbon (HCFC) with the formula CH₂ClF. It is a colorless, odorless, flammable gas.^[1] 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.^[2]

Uses

Pyrolysis of a mixture of dichlorofluoromethane and chlorofluoromethane gives hexafluorobenzene:^[1]

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 (0.10⁻¹ nm), β = 108.205°.^[3]

At an altitude of 22 km, traces of chlorofluoromethane occur (148 ppt).^[4]

References

^ ^a ^b 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.
^ https://www.epa.gov/ods-phaseout/phaseout-class-ii-ozone-depleting-substances
^ 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.
^ 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.