Fluoromethane

Fluoromethane

Names
IUPAC name Fluoromethane
Other names Freon 41 Methyl fluoride Halocarbon 41 Monofluoromethane
Identifiers
CAS Number	593-53-3 Y
3D model (JSmol)	Interactive image
Abbreviations	R41
Beilstein Reference	1730725
ChEBI	CHEBI:28826 Y
ChEMBL	ChEMBL116838 Y
ChemSpider	11148 Y
ECHA InfoCard	100.008.907
EC Number	209-796-6
Gmelin Reference	391
KEGG	C11147 Y
MeSH	Fluoromethane
PubChem CID	11638
UNII	54A9X6F0CM Y
UN number	UN 2454
CompTox Dashboard (EPA)	DTXSID6060474
InChI InChI=1S/CH3F/c1-2/h1H3 Y Key: NBVXSUQYWXRMNV-UHFFFAOYSA-N Y InChI=1/CH3F/c1-2/h1H3 Key: NBVXSUQYWXRMNV-UHFFFAOYAF
SMILES FC
Properties
Chemical formula	CH3F
Molar mass	34.03 g/mol
Appearance	Colourless gas
Odor	pleasant, ether-like odour at high concentrations
Density	1.4397 g/L 0.557 g/cm3 (liquid) at saturation pressure at 25 °C
Melting point	−137.8 °C (−216.0 °F; 135.3 K)[1]
Boiling point	−78.4 °C (−109.1 °F; 194.8 K)[1]
Solubility in water	1.66 L/kg (2.295 g/L)
Vapor pressure	3.3 MPa
Hazards
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H220, H280
Precautionary statements	P210, P377, P381, P403, P410+P403
NFPA 704 (fire diamond)	1 4 0
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

Fluoromethane, also known as methyl fluoride, Freon 41, Halocarbon-41 and HFC-41, is a non-toxic, liquefiable, and flammable gas at standard temperature and pressure. It is made of carbon, hydrogen, and fluorine. The name stems from the fact that it is methane (CH₄) with a fluorine atom substituted for one of the hydrogen atoms. It is used in semiconductor manufacturing processes as an etching gas in plasma etch reactors.^[2]

Composition

The compound is the lowest mass member of the hydrofluorocarbon (HFC) family, compounds which contain only hydrogen, fluorine, and carbon. These compounds are related to the chlorofluorocarbons (CFC), but since they do not contain chlorine, are not destructive to the ozone layer.^[3] Fluorocarbons are, however, potent greenhouse gasses, and the Kigali Amendment to the Montreal Protocol is an attempt to phase them out due to their contribution to global warming.^[4]

The C−F bond energy is 552 kJ/mol and its length is 0.139 nm. Its molecular geometry is tetrahedral.

Its specific heat capacity (C_p) is 38.171 J·mol⁻¹·K⁻¹ at 25 °C. The critical point of fluoromethane is at 44.9 °C (318.1 K) and 6.280 MPa.

See also

• Organofluorine chemistry
• Halomethanes

References

External links

• Thermochemical data at chemnet.ru