Also Called: Nickelate(6-),[[[1,2-ethanediylbis[nitrilobis(methylene)]]tetrakis[phosphonato]](8-)], pentasodium hydrogen,(OC-6-21)-;Nickelate(6-), [[[1,2-ethanediylbis[nitrilobis(methylene)]]tetrakis[phosphonato]](8-)-N,N',OP,OP',OP'',OP''']-, pentasodium hydrogen, (OC-6-21)-;Nickelate(6-), [[[1,2-ethanediylbis[(nitrilo-.kappa.N)bis(methylene)]]tetrakis[phosphonato-.kappa.O]](8-)]-, sodium hydrogen (1:5:1), (OC-6-21)-;Nickel compounds;Hydrogen pentasodium [[[ethylenebis[nitrilobis(methylene)]]tetrakis[phosphonato]](8-)]nickelate(6-);Pentasodium nickelous 1,2-ethanedi(nitrilodi(methylene phosphonate));NICKELATE (6-), [[[1,2-ETHANEDIYLBIS[NITRILOBIS(METHYLENE)]]TETRAKIS[PHOSPHONATO]](8-)]-, PENTASODIUM HYDROGEN, (OC-6-21)-;Nickelate(6-), [[[1,2-ethanediylbis[(nitrilo-.kappa.N)bis(methylene)]]tetrakis[phosphonato-.kappa.O]](8-)]-, pentasodium hydrogen, (OC-6-21)-;Nickelate(6-), [[[1,2-ethanediylbis[(nitrilo-κN)bis(methylene)]]tetrakis[phosphonato-κO]](8-)]-, pentasodium hydrogen, (OC-6-21)-;Nickelate(6-), [[[1,2-ethanediylbis[(nitrilo-κN)bis(methylene)]]tetrakis[phosphonato-κO]](8-)]-, sodium hydrogen (1:5:1), (OC-6-21)-