specification:
color: light yellow
percentage: 29% or more than 29%
Specifications
|
Item
|
Excellent
|
First grade
|
Second grade
|
|
Appearance
|
Colorless
|
Brown
|
Yellow
|
|
AL2O3, %, ≥
|
20.0
|
20.0
|
20.0
|
|
Fe2O3, %, ≤
|
0.1
|
0.2
|
0.3
|
|
Water insoluble substance ,%, ≤
|
0.1
|
0.1
|
0.1
|
|
PH (1% aqueous solution)
|
2.5
|
2.5
|
2.5
|
|
As, %, ≤
|
0.0005
|
0.0005
|
0.0005
|
|
Heavy metal, (lead), %, ≤
|
0.002
|
0.002
|
0.002
|
