The phthalocyanine dyes are few in number, but those few are commonly used. Alcian blue is employed in one of the standard methods for acid mucopolysaccharides. Luxol fast blue is used to demonstrate myelin.
Phthalocyanin dyes have the general formula below. These vary with each dye. At the point marked X various groups are attached.
R. D. Lillie.
Conn's Biological Stains
Williams & Wilkins, Baltimore, MD., U.S.A.