Electronic colloidal silica

Electronic colloidal silica (silicon dioxide,silica sol)Particle size 8-20(nm),low impurity, high diaphaneity, well-proportioned

Electronic colloidal silica
ES-205 is the type of electronic colloidal silica. Its standard is follows
Designation
Standard
Appearance
Slight milky transparent to translucent
SiO
2
(wt%)
20-21%
Na
2
O (wt%)
≤0.2%
Ions
(ppm)
Fe
≤30
Al
2
O
3
≤1000
Cu
≤0.2
Pb
≤1.0
Cr
≤2.0
PH (20°C)
8.5-9.0
Density (20°C,g/cm
3
)
1.12-1.14
Viscosity (20°C,mPaS)
≤10
Particle size (nm)
8-20

Packing & Storage
Colloidal silica is packed in 25kg,250kg or 1000kg plastic 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 SiO
2
crystalline deposits.
If you want to remove the deposition from empty drums, use a 10-percent NaOH solution at 50~60.