Nickel borate hydrate (Ni?(BO?)?·xH?O) is an inorganic compound composed of nickel, boron, and oxygen, typically found in hydrated form. It is valued for its catalytic properties, particularly in organic synthesis and electrochemical applications. The material exhibits thermal stability and can serve as a precursor for nickel-based catalysts or functional materials. Its borate component contributes to flame-retardant characteristics, making it useful in specialized coatings or composites. The hydrate form allows for controlled dehydration, enabling tailored reactivity in high-temperature processes. Nickel borate hydrate is also studied for its potential in energy storage systems due to its redox-active nickel centers. Proper handling is required due to nickel's toxicity.