Pararosaniline
Pararosaniline, pararosaniline free base, Basic Red 9, or C.I. 42500 is an organic compound with the formula. It is the free base form of pararosaniline hydrochloride,, a magenta solid with a variety of uses as a dye. It is one of the four components of basic fuchsine. It is structurally related to other triarylmethane dyes called methyl violets which feature methyl groups on nitrogen.
It is prepared by the condensation of aniline and. Alternatively, it arises from the oxidation of 4,4'-bis(aminophenyl)methane in the presence of aniline.
Uses
- It is used to dye polyacrylonitrile fibers.
- It is used to detect sulfur dioxide.
- Pararosaniline is used as a colorimetric test for aldehydes, in the Schiff test. It is the only basic fuchsine component suitable for making the aldehyde-fuchsine stain for pancreatic islet beta cells.
- It has use as an antischistosomal.