Aminothiazole (2-aminothiazole, CAS 96-50-4) is a heterocyclic amine used as a versatile building block in organic synthesis. It is employed as a precursor for sulfur-containing agents and biologically active molecules, and can act as a reaction accelerator. The compound has molecular formula C3H4N2S, molecular weight 100.14 g/mol, and is supplied as a white to off-white crystalline solid with high analytical purity.