1,3,2-Dioxaphosphorinane, 2,2'-oxybis(5,5-dimethyl-, 2,2'-disulfide 2,2'-Oxybis(5,5-dimethyl-1,3,2-dioxaphosphorinane) 2,2'-disulphide 4090-51-1 70323-50-1 EINECS 223-829-1