2,4,8,10-Tetraoxa-3,9-diphosphaspiro(5.5)undecane, 3,9-bis(phenylmethyl)-, 3,9-dioxide 20544-37-0 3,9-Bis(phenylmethyl)-2,4,8,10-tetraoxa-3,9-diphosphaspiro(5.5)undecane, 3,9-dioxide 3,9-Dibenzyl-2,4,8,10-tetraoxa-3,9-diphosphaspiro(5.5)undecane 3,9-dioxide EINECS 243-869-3