Pararosanilin (or pararosaniline) is one of the major constituents of Basic fuchsin, together with Rosanilin, Magenta II and New fuchsin. It is the component which makes the best Schiff's reagent, although samples of basic fuchsin can vary considerably in the proportion of the dye. Pararosanilin may be purchased under it's own name, and is more reliable for Shiff's reagent when this is done. Compare the formulae of the constituents of basic fuchsin.
R. D. Lillie.
Conn's Biological Stains
Williams & Wilkins, Baltimore, MD., U.S.A.
Aldrich chemical catalogue, 1992
Aldrich Chemical Company, Milwaukee, WI, USA.
Edward Gurr, (1971)
Synthetic dyes in biology, medicine and chemistry
Academic Press, London, England.