A member of the class of hydroxyanthraquinones that is 1,3-dihydroxyanthraquinone carrying additional sulfo and amino substituents at positions 2 and 4 respectively. The sodium salt is the histological dye 'nuclear fast red'
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This entity has been manually annotated by the ChEBI Team.
A dye used in microscopic or electron microscopic examination of cells and tissues to give contrast and to highlight particular features of interest, such as nuclei and cytoplasm.