Action of Chloride of Benzyl upon Naphthylamin. —
Ch. Froté and D. Tommasi.
Erythrophenic Acid, a New Reaction of Phenol
and Aniline.—E. Jacquemin.—When phenol is treated
with chlorine-water, no reaction is observed, and ammonia
added to the mixture subsequently develops no
colouration. It is known that aniline, on the contrary, suspended in water, with the addition of a solution of chlorine, takes a rose colour, which
rapidly becomes purple, violet, and, lastly, brownish red, and that ammonia added at this last juncture increases the brownness. It is no longer the
same when a mixture of a drop of phenol and a drop of aniline is submitted to the aflion of solution of chlorine. A permanent rose-red is obtained,
which may be turned to a blue either by ammonia or by the alkalies or alkaline carbonates. Acids restore the original redness. The author concludes
that there exists a phenate of phenylamin ; that the new body produced in the above reaction is a red acid, forming blue salts; the erythrophenate of
soda may be produced by causing hypochlorite of soda to aft upon the mixture of phenol and aniline. The blue thus formed is remarkable for its purity
and extraordinary tinftorial power. If two drops of the mixture of phenol and aniline be added to 2 litres of water, and then treated with
hypochlorite, the blue in an hour or two becomes so intense that it could be recognised even in 4 litres of water. This reaction may be useful in
toxicological researches either for aniline or phenol. The purity and permanence of the blue might render it fit for the uses of the dyer, but it will
not bear steaming. The extreme facility with which it is reddened by the feeblest acids is likewise an objeftion. In this re- speft it far exceeds
litmus. |
