Borax, an inorganic compound commonly written as Na2B4O7 · 10H2O, has a molecular weight of 381.37. Borax is a very important boron containing mineral and boron compound. Usually a white powder containing colorless crystals, easily soluble in water. Borax has a wide range of uses, including as a cleaning agent, cosmetic, insecticide, buffer solution preparation, and other boron compounds. [1] Borax has a high toxicity, and is often banned as a food additive in many countries around the world. If the human body ingests too much boron, it can cause cumulative poisoning in multiple organs.