Fluoromethane

Fluoromethane
IUPAC name	Fluoromethane
Other names	Monofluoromethane, Methyl fluoride, Fluoromethylidyne, Freon 41, Halocarbon 41, R41, UN 2454
Identifiers
CAS number	593-53-3 Y
PubChem	11638
EC number	209-796-6
KEGG	C11147
ChEBI	28826
SMILES	CF
InChI	1/CH3F/c1-2/h1H3
Properties
Molecular formula	CH3F
Molar mass	34.03 g/mol
Appearance	Colorless, odorless gas
Density	0.5786 kg/m3 at 20 °C 0.557 g/cm3 (liquid) at saturation pressure at 25 °C
Melting point	131.4 K (-141.8 °C)
Boiling point	195.0 K (-78.2 °C)
Solubility in water	1.66 l/kg (2.295 g/l)
Vapor pressure	3.3 MPa
Hazards
EU classification	Very flammable (F+)
R-phrases	R12
S-phrases	S9, S16, S23, S24/25, S26, S28, S33, S36/37/39, S60
NFPA 704	4 1 0
Y (what is this?)  (verify) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
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 used in the manufacture of semiconductor and electronic products. In the presence of an RF field fluoromethane will dissociate into fluoride ions that selectively etch silicon compound films (reactive-ion etching).

Bond energy of C-F is 552 kJ/mol and its length is 0.139 nm (typically 0.14 nm).

Its specific heat capacity is C_p = 38.171 J.mol^-1.K^-1 at 25 °C. Critical point of fluoromethane is at 44.9 °C (318.1 K) and 6.280 MPa. Its global warming potential is GWP = 150.

External links

• National Pollutant Inventory - Fluoride and compounds fact sheet
• MSDS at Oxford University
• Data at Airliquide Encyclopedia
• Termochemical data at chemnet.ru