Di-Sodium Octa Borate Tetra Hydrate is water soluble by maximum 1.0. The Tetra Hydrate contains minimum 20.0 boron and maximum 0.003 lead. The Tetra Hydrate is formulated using quality grade raw material which ensures optimum durability along with long lasting trouble free use. Di-Sodium Octa Borate Tetra Hydrate can be custom made in various grades as per specific requirements.