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Aurintricarboxylic acid

(Science: chemical) 5-((3-carboxy-4-hydroxyphenyl)(3-carboxy-4-oxo-2,5-cyclohexadien-1-ylidene)methyl)-2-hydroxybenzoic acid. A dye which inhibits protein biosynthesis at the initial stages. The ammonium salt (aluminon) is a reagent for the colourimetric estimation of aluminum in water, foods, and tissues.

chemical name: benzoic acid, 5-((3-carboxy-4-hydroxyphenyl)(3-carboxy-4-oxo-2,5-cyclohexadien-1-ylidene)methyl)-2-hydroxy-