Cobalt(II) citrate 2-hydrate

1,2,3-propanetricarboxylicacid, 2-hydroxy-, cobalt(2+) salt, hydrate (2:3:2) ; cobalt citrate dihydrate ; cobalt(ii) citrate dihydrate ; 1,2,3-propanetricarboxylicacid, 2-hydroxy-, cobalt(3+) salt (2:3), dihydrate (9ci) ; citric acid,cobalt(3+) salt (2:3), dihydrate (8ci)