It is colorless transparent liquid, with the aroma of the similar benzene. Soluble in ethanol, ether and other organic solvents, insoluble in water.It is a kind of important organic chemical raw materials, mainly used for dye, medicine, and resin. Synthesis of new broad spectrum antibiotic cephalothin, is a kind of important pharmaceutical chemical additives, also can be used in color film making and special photography, synthesis of a complex reagent, uranium and other metals used for the extraction and separation, etc.