Size 0-550 microns (30mesh) Bulk density 0.3-0.5g/cm©ø True density 0.90-0.95g/cm©ø Compressive strength 28mpa min Moisture 0.5% max Floating rate 95% min by volume Specific density: 0.90-0.95g/cc Appearance grey/white powder Mosh scale 5-7 Ph 6 Coefficient of heat conductivity 0.054-0.095w/m.K Refractive index 1.54 Melting point 1400¡é min Loss on ignition at 1000¡é < 3% Refractoriness 1550-1750¡é 25kg/pp bag