SAFRANINE, in chemistry, the azonium compounds of symmetrical diamino-phenazine and containing the ring system annexed: / N / or X N .% CI R C1 R They are obtained by the joint oxidation' of one molecule of a paradiamine with two molecules of a primary amine; by the condensation of para-aminoazo compounds with primary amines (0.
The "safranine" of commerce is a tolusafranine.
Reference should be made to the articles Dyeing, Fuchsine, Safranine, Indulines, for more details On this subject.
In commerce three brands of aniline are distinguished - aniline oil for blue, which is pure aniline; aniline oil for red, a mixture of equimolecular quantities of aniline and orthoand para-toluidines; and aniline oil for safranine, which contains aniline and ortho-toluidine, and is obtained from the distillate (echappes) of the fuchsine fusion.
For the phenazonium salts see Safranine.