Colorless crystalline powder, odourless, taste salty. Melting point is 75 ℃. Weathering in dry air. Soluble in water, glycerin, insoluble in ethanol, alkaline aqueous solution. PH9.5. Heated to 100 ℃ lose 5 molecular crystal water, 320 ℃ is completely water loss.

Mainly for the production of boric acid, borax, element boron and boron compounds, etc. Boron ore of chemical products is a good reducing agent, antioxidant, bromide reagent, organic synthesis catalyst, raw material of the plastic foaming agent, synthesis of alkanes. Boron used in the manufacture of soap and detergent in light industry; The building materials industry for making all kinds of glass, glass fiber; Used in the manufacture of boron steel in metallurgical industry and as the metallurgical flux, metal welding agent; In the aerospace industry as a high-energy jet fuel, rocket nozzles, lined with high frequency electric furnace and vacuum chamber; In the nuclear industry of boron isotope used for atomic reactor materials; Used for seed soaking, the preparation of boron on agricultural pesticides and fertilizers. Also used in medicine, machinery, electronics, ceramics, glass, textile, leather, paint, dyes and other departments.