Search results
Results From The WOW.Com Content Network
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 most important is dichloromethane, which is mainly used as a solvent. Chloromethane is a precursor to chlorosilanes and silicones. Historically significant (as an anaesthetic), but smaller in scale is chloroform, mainly a precursor to chlorodifluoromethane (CHClF 2) and tetrafluoroethene which is used in the manufacture of Teflon. [2]
Bromodichloromethane is a trihalomethane with formula C H Br Cl 2.It is a colorless, nonflammable liquid which will dissolve in water, or evaporate in air. [1] Most of the chemical is produced through the chlorine disinfection process, [1] and as a result it can occur in municipally-treated drinking water. [2]
Engvild hypothesized in 1996 that 4-Cl-IAA may be a "death hormone" that maturing seeds use to trigger death of the parent plant by mobilizing nutrients to be stored in the seed. [ 8 ] Lam et al found the substance in the seeds of Medicago truncatula , Melilotus indicus , and three species of Trifolium .
Several million tons of chlorinated methanes are produced annually. Chloromethane is a precursor to chlorosilanes and silicones. Chlorodifluoromethane (CHClF 2) is used to make teflon. [7] Alkyl bromides Large scale applications of alkyl bromides exploit their toxicity, which also limits their usefulness.
DCM is produced by treating either chloromethane or methane with chlorine gas at 400–500 °C. At these temperatures, both methane and chloromethane undergo a series of reactions producing progressively more chlorinated products. In this way, an estimated 400,000 tons were produced in the US, Europe, and Japan in 1993. [12] CH 4 + Cl 2 → CH ...
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
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 ).