Absorption maximum, λ max: 950nm                

Absorptivity in chloroform: 42 L g^-1 cm^-1

Appearance: black powder                

Melting point: 230 – 235°C

Solubility in grams/100 grams of solvent:

            MEK 0.35 grams

            Xylene 0.15 grams

            THF 0.80 grams

            Cyclohexanone 1.05 grams