P/N |
HP10 |
HP20 |
HP30 |
HP40 |
Particle size (nm) |
10-20 |
10-20 |
10-20 |
10-20 |
SiO₂ content (%) |
25 |
30 |
21-25 |
38-40 |
PH |
8-9 |
8-9 |
2-4 |
3-5 |
Metallic ion |
<10ppm |
<50ppm |
<60ppm |
<60ppm |
Shelf life (months) |
12 |