Cobalt(III) nitrate is an inorganic compound with the chemical formula Co(NO3)3.

The three bidentate nitrate ligands give a distorted octahedral arrangement.

The O-Co-O angles for the chelating oxygen atoms in the same nitrate anion is about 68 degrees.

[4][2] Cobalt(III) nitrate oxidizes water, the initial green solution rapidly turns pink, with formation of cobalt(II) ions and release of oxygen.

[1] Cobalt(III) nitrate can be intercalated in graphite, in the ratio of 1 molecule for each 12 carbon atoms.