Copper(I) thiocyanate (or cuprous thiocyanate) is a coordination polymer with formula CuSCN. It is an air-stable, white solid used as a precursor for the preparation of other thiocyanate salts.

Properties of Copper thiocyanate

Chemical formula : CuSCN

Molar mass : 121.628 g/mol

Appearance : white powder

Density : 2.88 g/cm³

Melting point : 1084 °C (1,983 °F; 1,357 K)

Solubility in water : 8.427·10−7 g/L (20 °C)

Uses of Copper thiocyanate

1. Copper thiocyanate is used in photovoltaics in some third-generation cells as a hole transfer layer. It acts as a P-type semiconductor and as a solid-state electrolyte. It is often used in dye-sensitized solar cells.

2. Copper thiocyanate with NiO act synergically as a smoke suppressant additive in polyvinyl chloride (PVC).

3. Copper thiocyanate precipitated on carbon support can be used for conversion of aryl halides to aryl thiocyanates. 

4. Copper thiocyanate is used in some anti-fouling paints. Advantages compared to cuprous oxide include that the 5 compound is white and a more efficient biocide.

5. Copper thiocyanate is Used in marine antifouling paints and primers for explosives.