Borax and boric acid are essentially the same thing and normally associated with making homemade laundry soap. Both materials contain the element boron. Usually, Borax is mined and refined from tourmaline, kernite, and colemanite. Boric acid is mined from the mineral sassolite.
Is Borax an insecticide?
Borax is the basic mineral that is mined from the ground, and it is then refined through processing into boric acid. Borax such as you would purchase and use in the washing of clothes is not refined as much nor ground as fine as boric acid, and it is not labeled for use as a pesticide.
Is boric acid harmful to pets?
Compared to many other household chemicals, insecticides and flea control products, boric acid is not very toxic. A healthy adult cat is not likely to become seriously ill unless a very large amount is ingested. Symptoms usually subside as the boric acid leaves the body, and normally there are no long-term effects.