Synonyms: 1,3,5,7,2,4,6,8-Tetrazatetraphosphocine,2,2,4,4,6,6,8,8-octachloro-2,2,4,4,6,6,8,8-octahydro- (8CI,9CI);1,1,3,3,5,5,7,7-Octachlorocyclotetraphosphaza-1,3,5,7-tetraene;2,2,4,4,6,6,8,8-Octachloro-2,2,4,4,6,6,8,8-octahydro-1,3,5,7,2,4,6,8-tetraazatetraphosphocine;Dichlorophosphazene cyclic tetramer; NSC 37389; Nitrogen chloride phosphide((NPCl2)4); Octachlorocyclophosphazatetraene;Octachlorocyclotetraphosphazatetraene; Octachlorocyclotetraphosphazene;Octachlorotetraphosphazene; Octachlorotetraphosphonitrile; Phosphonitrilechloride, cyclic tetramer; Phosphonitrilic chloride cyclic tetramer;Phosphonitrilic chloride tetramer; Tetraphosphonitrile chloride