Basic information Chinese Name: decahydrate borax Chinese alias: Ten water sodium tetraborate, sodium tetraborate (decahydrate) [1] English name: Borax Deca Hydrate HS coding: 28401900 CAS Number: 1303-96-4 Formula: Na2B4O7 · 10H2O Molecular Weight: 381.37 moisture: Ten Water Level: PT Boiling point: 1575 ℃ melting point: about 880 ℃ density: 1.73 Melting point: 75 ℃ Dangerous Goods: No regulatory conditions: no two traits described as a translucent colorless crystals or white crystalline powder; odorless, taste salty; heated to 350-400 ℃ lose all crystal water is the anhydrous borax. (Na2B4O7), the density of 1.72g / cm3; soluble in water, soluble in glycerin, insoluble in alcohol. Weakly alkaline aqueous solution, colorless glass melting. Bactericidal effect, oral harmful. In chemical composition, which contains 10 water molecules sodium tetraborate. It is a plate or columnar crystals, forming a druse crystals together, granular, porous soil block, etc., the color is white with gray or light colored with yellow, blue, green, etc., with shiny glass.