Absorption maximum, lambda max: 634nm                

Absorptivity in acetone: 170 L g^-1 cm^-1

Appearance: blue powder                     

Melting point: 154 – 160°C

Solubility in grams/100 grams of solvent:

            MEK 28.5 grams

            Cyclohexanone 21.0 grams

            Xylene 0.07 gram