Used as an antiseptic for minor cuts and burns, boric acid solution helps prevent infection due to its mild bacteriostatic and fungistatic properties. It is commonly applied in ophthalmic preparations, such as eye washes or drops, for soothing eye irritations, treating conjunctivitis, and reducing irritation from dirt or chlorine in water.

In household settings, it serves as an insecticide and wood preservative, particularly effective against ants and cockroaches when mixed with sugar to attract pests or applied to wood surfaces.

In industrial applications, it acts as a buffering agent and pH adjuster in various formulations. It is utilized in the manufacture of borate salts, glass, and ceramics for thermal resistance and stability. In the metal industry and welding, it prevents oxidation of metal surfaces during heating and is a component in welding flux to improve efficiency. In nuclear power plants, it functions as a neutron absorber in coolant systems to control reactor activity.

In laboratory settings, it is used as a buffer to control pH and in the analysis of fluoride levels in water samples.

Additionally, due to its low toxicity to humans when used appropriately, it is safe for many applications, but caution is advised: excessive contact or ingestion can be toxic, especially to children and pets.