Silica Fume NR950 is a dry powder available in two forms,densified silica fume and undensified silica fume . Silica Fume NR950 is a pozzolanic material that consists primarily of fine silicon dioxide particles in a non-crystalline form. Silica Fume NR950 contains a minimum of 95% silicon dioxide (SiO2). Technical Data: Index items Standard Value SiO2(Silicon Dioxide) Min. 95.0% Fe2O3 (Iron Oxide) Max. 0.3% Al2O3(Aluminium Oxide) Max. 0.5% CaO(Calcium Oxide) Max. 0.4% MgO(Magnesium Oxide) Max. 0.5% K2O(Potassium Oxide) Max. 1.0% Na2O(Sodium Oxide) Max. 0.4% Moisture Content(H2O) Max. 1.0% Loss on Ignition(L.O.I) Max. 1.5% Percent Retained On 45micron (325 sieve) Max. 1.0% Bulk Density 250-350kg/m3 and 500-600kg/m3 Silica Fume CAS#: 69012-64-2  Silica Fume Packing: 500kg/jumbo bags, 20kg and 25kg small plastic woven bags.  Application & Usage: 1. Newreach Silica Fume 950 is used in cement. 2. Newreach Silica Fume 950 is used in concrete. 3. Newreach Silica Fume 950 is used in mortars. 4. Newreach Silica Fume 950 is used in refractory.