Tech grade
Item |
Spec. |
Result(super grade) |
Result(qualified grade) |
Assay: |
98.0%-99.5% |
99.23% |
99.12% |
Melting point: |
286 -289℃ |
287℃ |
287℃ |
moisture: |
0.5% - 1.0% |
0.37% |
0.43% |
Ash content: |
0.05% - 0.2% |
0.045% |
0.06% |
Colour and lustre |
30-50 |
32 |
36 |
Food grade
Total acid |
99.5% Min |
Sulphate |
0.01% Max |
AHPA |
(5% alcohol) 20 Max |
As |
3ppm Max |
Melting point |
287℃ Min |
Water |
0.25% Max |
Heavy metal (as Pb) |
10ppm Max |
Ash content |
0.05% Max |