... for alkali silicate, water glass,etc.AppearanceWhite PowderP2O5, %65.0-72.0Al2O3, %15.0-21.0Oil absorption, g/100g35 ± 10Density, g/cm32 ... .0-3.0Moisture, %≤3.0Matter dissolved in water, %3.0 ± 1.0pH value2.0-4.0Average particle size, micron≤10.045 ... micron sieve residue, %≤0.5 We also specialize ...