Infobox references. Tryptophan (abbreviated as Trp or W; encoded by the codon UGG) is an Î±-amino acid that is used in the biosynthesis of proteins. It contains an Î±-amino group, an Î±-carboxylic acid group, and a side chain indole, classifying it as a non-polar, aromatic amino acid.
toluene is a common name-The IUPAC name for toluene is methylbenzene.he use of this trivial form (acetate for ethanoic acid in general) is so common that this is called a retained IUPAC name.
Original vs. Toluene Free. The Briwax Original formula contains the solvent Toluene and the Toluene Free formula contains the solvents Xylene and Naphtha. Solvents are necessary in the formulation of Briwax because without them Briwax would just be a hard chunk of wax, almost unusable.Toluene has a high aroma factor, a strong smell, and some people love it and some hate it. The Toluene Free formula has a much lower aroma; it smells more like a dry cleaning solvent.riwax Original uses toluene mainly because it dissolves the beeswax 100%. So even if Briwax is liquid it will still work as intended. Toluene is also an excellent grease and grime cleaner. As Briwax is used on old antique pieces, the solvent is really at work cleaning off the old oxidized surface.