Pararosaniline
Pararosaniline, pararosaniline free base, Basic Red 9, or C.I. 42500 is an organic compound with the formula (H2NC6H4)2C=(C6H4NH). It is the free base form of pararosaniline hydrochloride, [(H2NC6H4)3C]+Cl−, a magenta solid with a variety of uses as a dye.