Borax Dårligst pH-adjuster-stabiliser No known benefits Borax at a glance Naturally occurring alkaline compound Used as a preservative, texture enhancer, and insecticide Strong potential to cause skin irritation Colorless crystalline solid in its raw form Borax description Borax, also known as sodium borate or sodium tetraborate, is a naturally occurring alkaline compound found commonly in dry lake beds. Because of its high (alkaline) pH, it has a variety of industrial applications, including preservative, texture enhancer, and insecticide. A by-product of Borax is boric acid, which is occasionally used in cosmetics. While borax isn’t commonly included in most modern skin care products, it still appears in some ingredient lists, one more reason to check such labels carefully. Again, due to its alkaline nature, borax has the strong potential to cause skin irritation (skin is naturally acidic). In high amounts, it can even cause chemical burns. In its raw form, borax is a colorless crystalline solid. Use levels of Borax (as sodium borate or boric acid) in cosmetics are limited to 5% concentrations or less. Related ingredients: Borate