English Name:Hexachlorocyclotriphosphazene;Phosphonitrilic chloride trimer CAS NO: 940-71-6;Molecular formula:CL6N3P3 Hexachlorocyclotriphosphazene is a bone like compound composed of phosphorus and nitrogen atoms, and generally exists in the form of chloride. It is the basic raw material for the synthesis of polyphosphazenes. The synthetic reaction is obtained by separating the ring oligomer of n = 3. White crystalline powder, insoluble in water, soluble in ethanol, benzene, carbon tetrachloride, etc