Identity (IR-spectrum): passes test

Identity (UV/VIS-Spectrum): passes test

Absorption maximum λmax.(perchloric acid (0,1 mol/l) in acetic acid): 622 - 626 nm

Spec. Absorptivity A 1%/1cm (λmax; 0.005 g/l;perchloric acid (0,1 mol/l) in acetic acid;calculated on dried substance): 640 - 950

Transition range: pH 8,0 - pH 9,6; apricot - turquoiseblue

Loss on Drying (105°C): ≤ 7 %

Suitability as indicator (for non-aqueous titration): passes test