Search results
Results from the WOW.Com Content Network
Bromoform was discovered in 1832 by Löwig who distilled a mixture of bromal and potassium hydroxide, as analogous to preparation of chloroform from chloral. [5]Bromoform can be prepared by the haloform reaction using acetone and sodium hypobromite, by the electrolysis of potassium bromide in ethanol, or by treating chloroform with aluminium bromide.
Most of the haloforms — specifically, chloroform (CHCl 3), bromoform (CHBr 3), and iodoform (CHI 3) — are easy to prepare through the haloform reaction, although this method does not lend itself to bulk syntheses. (Fluoroform (CHF 3) cannot be prepared in this manner.)
Bromoform, produced by several algae, is a known toxin, though the small amounts present in edible algae do not appear to pose human harm. [ 12 ] Some of these organobromine compounds are employed in a form of interspecies "chemical warfare".
Bromomethane, commonly known as methyl bromide, is an organobromine compound with formula C H 3 Br.This colorless, odorless, nonflammable gas is produced both industrially and biologically.
These toxic chemicals are avoided today in consideration of the fact that there are alternative water based, non-toxic heavy liquids like sodium polytungstate solutions. [1] With this relatively new heavy liquid densities up to 3.1 g·cm −3 can be adjusted . Adding parts of pulverulent tungsten carbide increases the density to 4.6 g·cm −3. [2]
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]
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]
Phase behavior Triple point: 281.84 K (8.69 °C), ? Pa Critical point? K (? °C), ? Pa Std enthalpy change of fusion, Δ fus H o: 11.046 kJ/mol Std entropy change