Newcomer Supply Nuclear Fast Red Stain, Kernechtrot is a versatile stain and/or counterstain that combines nuclear fast red dye with an aluminum sulfate mordant to selectively stain nuclear chromatin red and provide nonspecific background tissue staining in shades of pink. This stain solution is used in a wide variety of staining procedures that include: Alcian Blue 1%, pH 2.5 Stain, Alcian Blue 1%, pH 1.0 Stain, Fontana Masson Stain, Colloidal Iron Stain MÏ‹ller-Mowry, Iron Stain Gomori Prussian Blue, Reticulum Stain Gordon & Sweets, and Von Kossa Calcium Stain. Shelf Life is 2 years from date of manufacture. Store at 15-30°C.