What is CoSCN2H2O4?

Answer 1

It appears to be a Hydrated Cobalt-Sulfocyanide Complex

The formula should be written like this Co(SCN)2(H2O)4. The (SCN) is called a thiocyanate group.

Answer 2

Copper(II) thiocyanate is a chemical compound with the formula Cu(SCN)2. It is a coordination complex where copper is the central metal ion coordinated to thiocyanate ligands. The number "2H2O" indicates that the compound contains two water molecules as part of its crystal structure.