ITEM
|
SPECIFICATION
|
SiO2%≥
|
99.3
|
Pb%≤
|
0.001
|
Cd%≤
|
0.001
|
Fe%≤
|
0.40
|
Cu%≤
|
0.01
|
Ag%≤
|
0.001
|
As%≤
|
0.003
|
Ca%≤
|
0.10
|
Al%≤
|
0.20
|
Average particle size nm/g≤
|
200
|
Bulk density g/cm3≤
|
0.312
|
Surface Area sqm/g
|
8.0
|