Index name
Index
Grade
Super grade
Top grade
First grade
Second grade
Chroma
20
20
30
70
Assay %
99.5
98.5
98.0
95.0
Density20centigradeg/m
1.2598
1.2572
1.2559
1.2481
Chloride Assay
0.001
0.001
0.01
0.05
Sulfating Ash (%)
0.01
0.01
0.01
0.01
Acidity or Alkalinity (mmol/100g)
0.064
0.064
0.1
0.3
Saponification equivalent (mmol/100g)
0.64
0.64
1.0
3.0
Heavy metals Assay (as Pb, mg/kg
5
5
5
5
As (as As, mg/kg)
2
2
2
2