Chloromethane

CAS No. 74-87-3

Formula: CH3Cl
Basic Info

Chloromethane, also called methyl chloride, Refrigerant-40, R-40 or HCC 40, is a chemical compound of the group of organic compounds called haloalkanes. It was once widely used as a refrigerant. It is a colorless extremely flammable gas with a mildly sweet odor, which is, however, detected at possibly toxic levels. Due to concerns about its toxicity, it is no longer present in consumer products. Chloromethane was first synthesized by the French chemists Jean-Baptiste Dumas and Eugene Peligot in 1835 by boiling a mixture of methanol, sulfuric acid, and sodium chloride. This method is similar to that used today.

Formula
CH3Cl
Molecular Weight
50.4875
Exact Mass
49.9923
LogP
0.855
PSA
0
Synonyms

Methane, chloro-

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Properties
Appearance & Physical State
colourless gas
Density
0.92
Boiling Point
-24.2ºC
Melting Point
-97ºC
Flash Point
-46ºC
Refractive Index
1.0007
Stability
Stable. May react violently or explosively with interhalogens, magnesium, zinc, potassium, sodium or their alloys. Incompatible with natural rubber and neoprene composites, but does not attack PVA. Highly flammable. May decompose upon exposure to moist air
Storage Condition
2-8ºC
Safety Info
RTECS
PA6300000
Safety Statements
9-16-33
WGK Germany
2
Risk Statements
R12
HS Code
2903110000
RIDADR
UN 1993 3
Hazard Class
2.1
Caution Statement
P210; P281; P410 + P403
Caution Statement
Spectrum
NMR Spectrum 1H NMR : parameter in CCl4
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Analysis Methods
Kovats' RI, non-polar column, isothermal
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Column Shape
Packed
Active Phase(℃)
Squalane
Retention index
329.
Temperature Control
80.
Method
isothermal
Comments
N2, Chezasorb AW-HMDS; Column length: 1.2 m
Reference
Pacáková, V.Vojtechová, H.Coufal, P.Reaction gas chromatography: study of the photodecomposition of halogenated hydrocarbonsChromatographia1988, 25, 7, 621-626.
Kovats' RI, non-polar column, isothermal
expand collapse
Column Shape
Packed
Active Phase(℃)
Squalane
Retention index
324.
Temperature Control
27.
Method
isothermal
Comments
He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm
Reference
Hively, R.A.Hinton, R.E.Variation of the retention index with temperature on squalane substratesJ. Gas Chromatogr.1968, 6, 4, 203-217.
Kovats' RI, non-polar column, isothermal
expand collapse
Column Shape
Packed
Active Phase(℃)
Squalane
Retention index
326.
Temperature Control
49.
Method
isothermal
Comments
He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm
Reference
Hively, R.A.Hinton, R.E.Variation of the retention index with temperature on squalane substratesJ. Gas Chromatogr.1968, 6, 4, 203-217.
Kovats' RI, non-polar column, isothermal
expand collapse
Column Shape
Packed
Active Phase(℃)
Squalane
Retention index
327.
Temperature Control
67.
Method
isothermal
Comments
He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm
Reference
Hively, R.A.Hinton, R.E.Variation of the retention index with temperature on squalane substratesJ. Gas Chromatogr.1968, 6, 4, 203-217.
Kovats' RI, non-polar column, isothermal
expand collapse
Column Shape
Packed
Active Phase(℃)
Squalane
Retention index
329.
Temperature Control
86.
Method
isothermal
Comments
He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm
Reference
Hively, R.A.Hinton, R.E.Variation of the retention index with temperature on squalane substratesJ. Gas Chromatogr.1968, 6, 4, 203-217.
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