Borax Pure USP-National Formulary Grade highest quality and purity powder. Borax is not a soap or detergent, but rather a salt of boron. Borax is mined from the deserts of California and Turkey as a mineral salt, known as sodium tetraborate, is 99% pure and safe to use for various purposes. Borax may be used for numerous applications, including household uses such as cleaning, laundry, personal care and as a natural preservative. It has also been used for home remedies, healthcare, and boron supplementation. USP Borax has been naturally cleaned and processed to provide a higher-grade product approved by U.S. Pharmacopeia for internal use. This ingredient may be added to foods and beverages or smoothies and green drinks. It is a pure white powder and has no fillers, additives or preservatives. Only the highest quality natural food and bulk ingredients are sourced through family-owned Prescribed For Life Nutrition. Thank you for shopping with us and please come again!