Aqueous solution of nigrosine used with Eosin and nigrosine vital kit.

Nuclear Fast Red dye solution for staining nuclei. Counterstain in many special staining kits.

Lipid substances staining solution.

For use with Mallory Trichrome kit.

For use with Orcein kit.

For use with Hematoxylin P.T.A., Masson Fontana, Orcein, Paraldehyde Fuchsin and Reticulin staining kits.