Synonyms: 1,1'-Spirobi[indan]-6,6'-diol,3,3,3',3'-tetramethyl- (6CI,7CI,8CI); 2,2',3,3'-Tetrahydro-3,3,3',3'-tetramethyl-1,1'-spirobi[1H-indene]-6,6'-diol;3,3,3',3'-Tetramethyl-1,1'-spirobi[indane]-6,6'-diol;6,6'-Dihydroxy-3,3,3',3'-tetramethyl-1,1'-spirobiindane; SI; SI (diol)