The cross-linking of BUR with nitrogen nucleophiles involves alkylation by allylic bromide, followed by deprotonation of the resulting ammonium bromide
sail to give an allylic amine intermediate (Scheme 1; R(1)=H).
Modified silica can be obtained by using cationic surfactants (hexadecyl trimethyl ammonium bromide
and tetraethylammonium bromide).
1% solution of hexade-cyltrimethyl ammonium bromide
as the positive control.
Sodium bromide prices will increase by 20 percent, - Potassium and ammonium bromide
prices will increase by 10 percent, - HBr (Hydrobromic acid) prices will increase by up to 10 percent, - N-propyl bromide prices will increase by 10 percent, - CBM (chloro-bromo-methane) prices will increase by 12 percent, - DBM (di-bromo-methane) prices will increase by 20 percent.
Starks (1971), Herriott and Picker (1974) used different quaternary ammonium salts like Aliquat 336, benzyl triethylammoniumchloride, tetrabutylammonium bromide, and cetyl trimethyl ammonium bromide
to extract permanganate ion from aqueous solution for oxidation reactions.
Tensilon (3 hydroxy-phenyl dimethyl ethyl ammonium bromide
, or edrophonium) was selected from a group of compounds as the one possessing the greatest anticholinergic activity and the least muscarinic effect.
microbiological control chemistries (such as ammonium bromide
technology) that allow mills to reduce water consumption via increased process stream recycling.
Starting materials of lanthanum oxide and excess of ammonium bromide
are made to react at 250[degrees]C to form a lanthanum bromide complex.
All reagents were analytical or chromatographic grade: acetonitrile, dioxane, ethanol, N-acetyl-N,N,N-trimethyl ammonium bromide
, and paraffin (viscous, DAB8), and RP-18 HPTLC precoated plates were from Merck.
Operating on the mechanism exactly identical with the low molecular weight organic substrates, octadecayl trimethyl ammonium bromide
is reported as accelerator in crosslinking reactions of these rubbers.
has supplemented its nonhalogen intumescent line with Spinflam MB 92/PP, a new low-halogen product containing ammonium bromide
, a non-aromatic compound said to produce low smoke and noncorrosive gases (PT, March '93, p.
Spectrum[R] Ammonium Bromide
Technology -- The best-selling biocide in the United States