NbS₂ is a metallic layered transition metal dichalcogenide. While the layers consist of covalently bound atoms, weak van der Waals forces hold the layers together. The layer can have two different stacking sequences, resulting in two different stable polytypes: 2H– and 3R–NbS₂. In this work, the formation of those two polytypes has been analyzed for a solid-state reaction of a fixed duration of three days. A phase diagram was established after careful PXRD analysis, and the normal-state and superconducting properties of a phase pure 2H and 3R sample, as well as of a mix of both, have been analyzed and compared. The here obtained synthesis parameters allow for an improved control of the phase purity and phase formation in the NbS₂ system.