Disodium Octa borate Tetrahydrate (or DOT) is a white, odorless, powdered substance containing the basic elements of boron and oxygen, and is most often used in pest control products that are designed to target wood-destroying insects such as termites, carpenter ants, and powder post beetles. Disodium octa borate Tetrahydrate is not flammable and presents little or no hazard (to humans).