Boric acid is used to fight fungus and bacterial infections, according to Drugs.com. It is also used as an insecticide, antiseptic and eye cleanser, notes Wikipedia.
Boric acid in the form of boric acid ophthalmic is a solution for washing out irritants in the eyes, according to Drugs.com. The chemical also protects the eyes against such toxic elements as chlorine, smog and various chemicals.
The antibacterial properties and alkaline levels make boric acid an effective treatment option for women suffering from bacterial vaginosis, claims Wikipedia. Its capacity to kill bacteria can address acne as well. Boric acid treats athlete's foot when applied in powder form to the feet. The chemical can kill bacteria that causes ear infections in animals and humans, otherwise known as otitis externa. It is also used on the skin to treat wounds.
Boric acid kills such insects as roaches, ants, fleas and termites, according to Wikipedia. The chemical is safe enough to be used around the home and kitchen to control insect populations. It works by disrupting an insect's metabolism, and the powder form is harmful enough to degrade the exoskeletons of bugs. Boric acid can also be used as a preservative to protect wood from rotting that is caused by insects and fungus.