67924-23-6 Cobaltate(6-), (((1,2-ethanediylbis((nitrilo-kappaN)bis(methylene)))tetrakis(phosphonato-kappaO))(8-))-, pentapotassium hydrogen, (OC-6-21)- EINECS 267-809-0 Pentapotassium cobaltous ethylenedi(nitrilodi(methylenephosphonate)) Pentapotassium hydrogen (((ethylenebis(nitrilobis(methylene)))tetrakis(phosphonato))(8-))cobaltate(6-)