Strontium sulfide is the inorganic compound with the formula SrS. It is a white solid. The compound is an intermediate in the conversion of strontium sulfate, the main strontium ore called celestite, to other more useful compounds
S 2637 (OTTO) Strontium sulphide, GR Cas 1314-96-1 - used as an additive in fireworks , because it produces a bright red flame when it is burned.