Solution A: Ferric Chloide, Acidified 500 ml, Solution B: Hematoxylin 1%, Alcoholic 500 ml. Newcomer Supply Hematoxylin Stain Set, Weigert Iron is the preferred nuclear stain in conjunction with trichrome and mucin stains. Iron hematoxylin is the optimal nuclear stain when succeeding stains are lengthy or acidic, where the use of an aluminum-mordanted hematoxylin stain would have a tendency to decolorize. Shelf Life is 2 years from date of manufacture. Store at 15-30°C