2,4,8,10-Tetraoxa-3,9-diphosphaspiro(5.5)undecane, 3,9-dichloro-, 3,9-dioxide 3,9-Dichloro-2,4,8,10-tetraoxa-3,9-diphosphaspiro(5.5)undecane 3,9-dioxide 714-87-4 EINECS 211-935-0 NSC 84078