Fluoromethane

Fluoromethane
IUPAC name Fluoromethane
Other names Freon 41 Methyl fluoride Halocarbon 41 Monofluoromethane
Identifiers
Abbreviations	R41
CAS number	593-53-3 Y, 558-21-4 (2H3) Y, 20666-44-8 (13C) Y
PubChem	11638 (2H3) Y, 450707 (11C) Y, 12336970 (13C) Y, 9833918 (17F), 450725 (18F) Y, 11638 Y
ChemSpider	11148 (2H3) Y, 396977 (11C) Y, 21170290 (13C) Y, 8009639 (17F) Y, 396995 (18F) Y, 11148 Y
EC number	209-796-6
UN number	UN 2454
KEGG	C11147 Y
MeSH	Fluoromethane
ChEBI	CHEBI:28826 Y
ChEMBL	CHEMBL116838 Y
Beilstein Reference	1730725
Gmelin Reference	391
Jmol-3D images	Image 1
SMILES FC
InChI InChI=1S/CH3F/c1-2/h1H3 Y Key: NBVXSUQYWXRMNV-UHFFFAOYSA-N Y InChI=1/CH3F/c1-2/h1H3 Key: NBVXSUQYWXRMNV-UHFFFAOYAF
Properties
Molecular formula	CH3F
Molar mass	34.03 g/mol
Appearance	Colorless, odorless gas
Density	1.4397 g/L 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 (verify) (what is: Y/N?) 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 made of carbon, hydrogen, and fluorine. The name stems from the fact that it is methane (CH₄) plus fluorine, minus a hydrogen. 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 molecular geometry is tetrahedral.

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.

External links

• MSDS at Oxford University
• Data at Airliquide Encyclopedia
• Termochemical data at chemnet.ru