The disodium salt of gallein is called alizarin violet. Gallein is of little use as a simple acid dye. It has been suggested as a hematoxylin substitute when mordanted by iron alum. As with most mordant dyes, there is a strong shift in the absorption maximum, and the mordanted dye consequently stains nuclei blue violet.
R. D. Lillie.
Conn's Biological Stains
Williams & Wilkins, Baltimore, MD., U.S.A.
Edward Gurr, (1971)
Synthetic dyes in biology, medicine and chemistry
Academic Press, London, England.
Susan Budavari, Editor, (1996)
The Merck Index, Ed. 12
Merck & Co., Inc., Whitehouse Station, NJ, USA