Nuclear Fast Red

Nuclear Fast Red is an optimized nuclear counterstain solution that produces an intense nuclear stain. It is an anionic dye used in conjunction with an aluminium salt as a mordant. In contrast to hematoxylin, Nuclear Fast Red is a rapid staining procedure, which requires only step and stains nucleus in five minutes. It is an excellent alternative in multiple labeling when hematoxylin would otherwise obscure the substrate colors.