|
|
Solid
|
||
|
|
Excellent
|
First class
|
Second class
|
|
Appearance
|
Light Yellow
|
||
|
AL2 O3 % ≥
|
30.0
|
29.0
|
27.0
|
|
Bssicity %
|
40-90
|
||
|
Water insoluble substance≤ %
|
0.5
|
1.0
|
1.5
|
|
Fe ≤%
|
0.1
|
0.2
|
0.6
|
|
PH(1% Solution)
|
3.5-5.0
|
||
|
SO 2-% ≤
|
9.8
|
||
|
Nitrogen % ≤
|
0.01
|
-
|
|
|
As % ≤
|
0.0002
|
-
|
|
|
Mn %≤
|
0.004
|
0.0045
|
-
|
|
Cr 6+ % ≤
|
0.0005
|
-
|
|
|
Hg % ≤
|
0.00001
|
-
|
|
|
Pb % ≤
|
0.001
|
-
|
|
|
Cd % ≤
|
0.0002
|
-
|
|
Use: Mainly used in drinking water treatment.