Synonyms: Phosphorousacid, ethyl ester, cyclic 1,1:4,4-diester with 1,1,4,4-cyclohexanetetramethanol(8CI); Phosphorous acid, ethyl ester, cyclic diester with1,1,4,4-cyclohexanetetramethanol (7CI);2,4,11,13-Tetraoxa-3,12-diphosphadispiro[5.2.5.2]hexadecane, 3,6-diethoxy-