It is a kind of polycyclic aromatic hydrocarbons with fluorescence if impure. It has molecular formula of C13H10. It is white flake crystal with characteristic aromatic smell similar to naphthalene.
                                    
                                    
                                        
                                            Product characteristics
                                        
                                        It is gray white crystal (colorless to pink flake crystal), with purple fluorescence. It is insoluble in water, but soluble in ethanol, ether, benzene, carbon disulfide, etc.