Appearance : Blue-black crystal or powder :
Content : ≥99.0% :
Carbon Content : Carbon content:>94.0%( By element analysis)
Purifying Methods : Sublimation in vacuum
Solubility : Insoluble in most of Organic Solvents,soluble slightly in hot Benzene
Melting Point : >300℃
Sublimation Point : 372~374℃