pharmaceutical grade aerosil fumed silica
production:
Fumed silica is made by the hydrolyzed chlorosilane with high temperature in hydrogen and oxygen blaze. It is a kind of inorganic fine chemical products which is white, nonpoisonous, odourless and amorphous
the technology specification:
Item |
HX150 |
HX 200 |
HX 380 |
|
Specific surface area m2/g (BET way) |
170±20 |
210±20 |
380±20 |
|
PH value(suspension liquid4%) |
3.6~4.5 |
3.6~4.5 |
3.6~4.5 |
|
Heating loss weight(2 hour,105°C) % max |
1.5 |
1.5 |
1.5 |
|
Burning loss (one hour 1000°C)weight % max |
1 |
1 |
1 |
|
SiO2 wt.% min |
99.9 |
99.9 |
999 |
|
Al2O3 wt.% max |
0.03 |
0.03 |
0.03 |
|
Fe2O3 wt.% max |
0.05 |
0.05 |
0.05 |
|
TiO2 wt.% max |
0.03 |
0.03 |
0.02 |
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