Absorption maximum, lambda max: 621nm                

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

Appearance: violet powder                 

Melting point: 172 – 175°C

Solubility in grams/100 grams of solvent:

            MEK >6.0 grams

            Xylene <0.1 gram

            Cyclohexanone >6.0 grams