CAS No. 1058-92-0
In the water and alcohol is readily soluble
Has a blue-violet color over a pH range from 9.5 to 10.0.
And its complexes with zinc ions, magnesium and calcium at the same conditions are painted red
In the direct titration of the transition from red to blue-violet.
as indicator in analytical chemistry to determine some elements;
as an acid-base indicator;
for dyeing silk, wool