CS-20, CS-25 and CS-30 are three types of High-pure colloidal silica, their technical standards are listed in the table:
Designation | Standard | |||
CS-20 | CS-25 | CS-30 | ||
Appearance | Slight milky transparent to translucent liquid | |||
SiO2 (wt%) | 20±1% | 25±1% | 30±1% | |
Na2O (wt%) | ≤0.2% | |||
Ions (ppm) |
Fe | ≤50 | ||
Cl- | ≤50 | |||
SO42- | ≤50 | |||
Al2O3 | ≤100 | |||
CO32- | ≤100 | |||
Others | <100 | |||
PH (20°C) | 8.0-9.5 | |||
Density (20°C, g/cm3) | 1.12-1.14 | 1.15-1.17 | 1.19-1.21 | |
Viscosity (20°C, mPa•S) | ≤35 | |||
Particle size (nm) | 8-15 | |||
Stability | Six months |
Specification: The technical standards can be adjusted according to requirements.