Nickel sulfate solution is widely used in the electroplating industry for nickel plating on various metal surfaces. It provides a durable, corrosion-resistant, and decorative finish to items like automotive parts, machinery components, and household fixtures.

In the manufacturing of batteries, particularly nickel-cadmium and nickel-metal hydride batteries, it serves as a key electrolyte component, contributing to efficient energy storage and discharge.

The solution is also utilized in the production of catalysts for chemical reactions, including hydrogenation and organic synthesis, due to its ability to enhance reaction rates and selectivity.

Additionally, it finds application in the textile industry as a mordant in dyeing processes, helping to fix dyes onto fabrics and improve colorfastness.

In agriculture, it is sometimes used as a micronutrient supplement in fertilizers to address nickel deficiencies in certain crops, promoting healthy growth and development.

Lastly, it plays a role in analytical chemistry as a reagent for qualitative and quantitative analysis of various substances.