ITEM
|
TOP GRADE
|
FIRST GRADE
|
Appearance
|
Purple to greish brown flakes or granule
|
|
Purity, %≥
|
98
|
96
|
Melting point, ℃≥
|
72
|
70
|
Heating loss, % ≤
|
030
|
0.30
|
Ash content, % ≤
|
0.20
|
0.30
|