... are five types of NH4-stabilizer including NS-10, NS-15, NS-20, NS-25 and NS-30.Their standards are ... -15NS-20NS-25NS-30AppearanceSlight milky transparent to translucent liquidSiO210±1%15±1%20±1%25±1%30±1%Na2O (wt%)≤0 ... .5-10.0Density (20°C,g/cm3)1.06-1.081.08-1.101.12-1.141.15-1.171.19-1 ... .21Viscosity (20°C,mPaS)≤10Particle size (nm)8-20StabilityTwo years ...