An organic sodium salt that is the disodium salt of 7-hydroxy-8-{[4-(phenyldiazenyl)phenyl]diazenyl}naphthalene-1,3-disulfonic acid. Occasionally used for the demonstration of muscle fibres in conjunction with, or as a replacement for, acid fuchsin.
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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.