1. Product property: sodium sulphate anhydrous is also called glauber¡¯s salt. It is white and odorless crystal or powder, with hydroscopic property. 2. Technical specifications: STANDARD: GB/T6009-2003 Appearance:White crystal NaSO4:99%min. Water:0.20%max. Water insolubles:0.05% max. Ca+ & Mg+:0.15% max. Chloride: 0.35% max. Whiteness: 80min. Degree. 3. Application: it could be used to produce sodium sulfide and sodium silicate, etc; and it could be also used in paper making, glass, printing and dyeing, synthetic fiber, tanning and other industries. 4. Packing: 50kg bag.