... be used, transported and stored. Molecular formula: K2O·nSiO2·H2O, n varies with the specification the uses. FP Powdery Instant Potassium ... .30-2.503.20-3.40SiO2, %48.0-54.060.0-66.0K2O, %31.0-35.028.0-32.0Dissolved Speed, s<60<120Apparent Density ... g/ml0.50-0.800.50-0.80Fineness (Sieving Residue ...