Absorption maximum, lambda max: 443nm                

Absorptivity in acetone: 28 L g^-1 cm^-1

Appearance: orange powder              

Melting point: 230 – 235°C

Solubility in grams/100 grams of solvent:

            MEK 0.60 grams

            Xylene 0.45 grams

            Cyclohexanone 0.28 grams