Sodium Metasilicate Anhydrous is a white, free-flowing, granular powder, which is used in many cleaners, detergents, and soap formulations. It is an effective cement binding agent, coagulant , dye fixative, binder, corrosion inhibitor, and penetrating sealant. Sales Specification Na2O: 50.50 ±1.00% SiO2: 46.50 ±1.00% Fe: 200 PPM Max Bulk Density: 1.05-1.35 g/cm3 Particle Size (18-60 Mesh): 93.00% Min Whiteness: 85.00 Min Packing 50 lb bag, 44 bags per pallet. DOT Transportation UN/NA: 3262 Proper Shipping Name: Corrosive Solid, Basic, Inorganic, n.o.s. (Sodium metasilicate, Anhydrous) Hazard Class: 8 Packing Group: II