Acidic colloidal silica

Acidic colloidal silica There are five types of Acidic colloidal silicaincluding HS-10, HS-15, HS-20, HS-25 and HS-30.Their standards are: Designation StandardHS-10HS-15HS-20HS-25HS-30AppearanceSlight milky transparent to translucent liquidSiO2 (wt%)10±1%15±1%20±1%25±1%30±1%Na2O (wt%)≤0.1%PH (20°C)≤4.0Density (20°C,g/cm3)1.06-1.081.08-1.101.12-1.141.15-1.171.19-1.21Viscosity(20°C,mPaS)≤7Particle size(nm)8-20Stability3 months Packing & Storage Colloidal silica is packed in 25kg,250kg or 1000kgplastic drums. Store the colloidal silica at a temperature between 0 and 50, avoid exposure to the air, and insulate it from the sun. Wash the empty drums as quickly as possible to avoid SiO2 crystalline deposits. If you want to remove the deposition from empty drums, use a 10-percent NaOH solution at 50 60.