Boric acid has uses in medicine, pest control, and household products, but its safety depends on the application and amount used. It's used topically to treat certain infections like yeast infections and athlete's foot, and as an antiseptic eyewash. It also acts as an insecticide to control ants, cockroaches, and termites, and can be used in cleaning products, personal care items, and as a flame retardant.

It's important to use it with care, as ingesting or inhaling large amounts can be harmful.

It is used as an anti-fungal ointment or powder and removes any foul odor of the feet by applying it inside stockings. It is also used for treating vaginal infections. Boric acid plays an effective role in pesticides and is effective against pests like rats, houseflies, cockroaches, etc.

For cockroaches simply sprinkle the powder in a safe place such as behind the stove or fridge where the cockroaches will walk through and then as they are being fastidiously clean, they clean the powder off their feet and die.

For ants mix half and half with icing sugar and place as dry bait by ant trails or at entrance of their nest if able.

Boric acid is called a swimming pool chemical because it has proved to be highly useful for maintenance. It can help stabilize the pH level of water and prevent problems with algae.