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Chloromethane, also called methyl chloride, Refrigerant-40, R-40 or HCC 40, is an organic compound with the chemical formula CH 3 Cl. One of the haloalkanes , it is a colorless, sweet-smelling, flammable gas.
The four common [a] members are fluoromethane, chloromethane, bromomethane and iodomethane. Historical name for this group is methyl halides ; it's still widely used. The compounds of this class are often described as CH 3 X or MeX (X - any halogen, Me - methyl group ).
Phase behavior Triple point: 175.43 K (–97.72 °C), 870 Pa Critical point: 416 K (143 °C), 6714.4 kPa Std enthalpy change of fusion, Δ fus H o: 6.43 kJ/mol
Chloromethane: Methyl chloride Methylation agent; e.g., for methyl trichlorosilane CH 3 Cl: Dichloromethane: Methylene chloride Solvent CH 2 Cl 2: Trichloromethane Chloroform: Solvent CHCl 3: Trichlorofluoromethane: Freon-11, R-11 CFC-11 CCl 3 F: Dichlorodifluoromethane: Freon-12, R-12 CFC-12 CCl 2 F 2: Chlorotrifluoromethane: CFC-13 CClF 3 ...
Chloroform, [10] or trichloromethane (often abbreviated as TCM), is an organochloride with the formula C H Cl 3 and a common solvent.It is a volatile, colorless, sweet-smelling, dense liquid produced on a large scale as a precursor to refrigerants and PTFE. [11]
The table is sortable by each of the following refrigerant properties (scroll right or reduce magnification to view more properties): Type/prefix (see legends); ASHRAE number
It was produced industrially from paraformaldehyde and a mixture of chlorosulfonic acid and sulfuric acid. [3] It is also produced as a byproduct in the Blanc chloromethylation reaction, formed when formaldehyde (the monomer, paraformaldehyde or formalin) and concentrated hydrochloric acid are mixed, and is a known impurity in technical grade chloromethyl methyl ether.
An example of photochlorination at low temperatures and under ambient pressure is the chlorination of chloromethane to dichloromethane. The liquefied chloromethane (boiling point -24 °C) is mixed with chlorine in the dark and then irradiated with a mercury-vapor lamp. The resulting dichloromethane has a boiling point of 41 °C and is later ...