Bromine-containing substances

For bromine-containing substances. Use 20 ml of a 30 per cent solution of analytical-reagent grade sodium chloride, 10 ml of sodium hypochlorite solution and 5 ml of buffer solution (a 20 per cent solution of sodium dihydrogen phosphate in water) as absorbing liquid. 

NorrishJ has sought to connect the catalytic activity of surfaces with their polar nature. By polar nature is meant a certain chemical unsaturation, usually associated with the presence of oxygen in the molecule. His work on the combination of ethylene and bromine has already been mentioned. The combination hardly takes place at all in vessels coated with paraffin wax, but is promoted by surfaces of such oxygen-containing substances as cetyl alcohol and stearic acid. To be quite conclusive such observations would have to be combined with others showing that the actual adsorption on paraffin wax is not very... 

During the analysis of PBDE in the particle phase of atmosphere samples from various sites in the United States, Hoh et al. [60] noticed a significant, unknown, bromine-containing gas chromatographic (GC) peak in some samples. To identify this unknown substance, full-scan mass spectra were obtained in both electron-impact and electron-capture negative ionization modes. Based on this analysis, it was suspected that this GC peak might be... 

Oxidizer Chemical substance that causes oxygen to combine with another chemical substance examples include oxygen and hydrogen peroxide Ozone depletion Destruction of the stratospheric ozone layer that protects the Earth from harmful effects of ultraviolet radiation. Depletion of ozone layer is due to the breakdown of certain chlorine- and/or bromine-containing compounds (chlorofluorocarbons or halons), which break down when they reach the stratosphere and then catalytically destroy ozone molecules Ozone layer Protective layer in the atmosphere, about 15 miles above the ground. The ozone layer absorbs some of the sun s ultraviolet rays, thereby reducing the amount of potentially harmful radiation that reaches the Earth s surface PAHs Polycyclic aromatic hydrocarbons... 

URANIUM HEXAFLUORIDE (10049-14-6) Violent reaction with water, steam, ethanol, producing hydrofluoric acid. Violent reaction with aromatic hydrocarbons, bromine trifluoride, Aqueous solution increases the explosive sensitivity of nitromethane and is incompatible with sulfuric acid, alkalis, alcohols, ammonia, aliphatic amines, alkanolamines, alkylene oxides, amides, epichlorohydrin, ethers, organic anhydrides, isocyanates, vinyl acetate. Attacks some plastics, rubber, and coatings. Aqueous solution attacks glass, ceramics, and silica-containing substances such as cast iron. 

Sharma, G.M. and Burkholder, P.R., 1967. Studies on the antimicrobial substances of sponges II. Structure and synthesis of a bromine-containing antibacterial compound from a marine sponge. Tetrahedron Lett., 1967 4147—4150. 

However, the CECs were not without eir own environmental problems. In September 1987 at the United Nations Environment Program Conference in Montreal, 24 countries signed the Montreal Protocol on Substances that Deplete the Ozone Layer. The protocol was the beginning of an international agreement on the reduction of CFCs that were shown to have a deleterious effect on the stratospheric ozone layer that protects us from harmful ultraviolet radiation. The initial protocol targeted CFCs and halons (bromine-containing CFCs) and proposed a 50 percent reduction in production by 1998 based on 1986 levels. Revisions to the protocol led to a ban on the manufactme of CFCs and other ozone-depleting chemicals effective by the end of 1995. 

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