Nitrate ya cobalt(II) (Co(NO3)2·6H2O): kirisitali zitukura zikurura ubuhehere bw’umwuka, zishonga cyane mu mazi; zikorwa hashongeshwa oxyde ya cobalt muri aside nitrike. Zikoreshwa gushyira cobalt ku bitwara catalyseur no nk’umuti wo gupima. Ni oxydant; yangiza iyo imizwe.