can't read?
Aluminone - the triammonium salt of aurintricarboxylic acid, is a dye commonly used to detect the presence of the aluminium ion in an aqueous solution.
A 1797 (OTTO) Aluminone, GR Cas 569-58-4 - used to detect the presence of the aluminium ion in an aqueous solution. Aluminon forms a red complex salt in combination with Al3+.