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Pararosaniline

p-rosaniline C.I. 42500 Para magenta

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 (e.g. crystal violet) 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.

References

References

  1. "pararosaniline free base (CHEBI:75372)". [[ChEBI]].
  2. Thomas Gessner and Udo Mayer "Triarylmethane and Diarylmethane Dyes" in ''[[Ullmann's Encyclopedia of Industrial Chemistry]]'' 2002, [[Wiley-VCH]], Weinheim.{{doi. 10.1002/14356007.a27_179
  3. "pararosaniline (CHEBI:87663)". [[ChEBI]].
  4. Horobin RW, Kiernan JA (2002) ''Conn's Biological Stains'', 10th ed. Oxford: BIOS.
  5. J. B. Pate, J. P. Lodge, A. F. Wartburg. (1962). "Effect of Pararosaniline in the Trace Determination of Sulfur Dioxide.". Analytical Chemistry.
  6. (1978). "Aldehyde fuchsin staining, direct or after oxidation: problems and remedies, with special reference to pancreatic B cells, pituitaries and elastic fibers". Stain Technology.
  7. "Pharmaceutical compositions containing pararosaniline or derivatives thereof".
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triarylmethane-dyes iarc-group-2b-carcinogens 4-aminophenyl-compounds hydrochlorides carbocations
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