Chromium(III) nitrate nonahydrate is used as a starting material in the production of other chromium compounds for the chrome plating industry, particularly in metal surface plating processes to enhance corrosion resistance and aesthetic appeal. It serves as a catalyst in organic synthesis, especially in oxidation reactions, and in various chemical processes. It acts as a mordant in dyeing and printing textiles to fix dyes onto fabrics. It is employed in the preparation of chromium-based catalysts and coatings. In the leather industry, it is applied in tanning to produce high-quality, durable, and shape-retaining leather with improved resistance to microbial attack. Additionally, it is utilized in the production of specialty chemicals, as a crosslinking agent in some polymer systems, and in laboratory research to study the properties of various chromium compounds.