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    Electronic colloidal silica

    ES-205 is the type of electronic colloidal silica. Its standard is follows:

    Designation Standard
    Appearance Slight milky transparent to translucent liquid
    SiO2 (wt%) 20-21%
    Na2O (wt%) ≤0.2%
    Ions
    (ppm)    		 Fe ≤30
    Al2O3 ≤1000
    Cu ≤0.2
    Pb ≤1.0
    Cr ≤2.0
    PH (20°C) 8.5-9.0
    Density (20°C, g/cm3) 1.12-1.14
    Viscosity (20°C, mPa•S) ≤10
    Particle size (nm) 8-15
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