ITEM
|
TOP GRADE
|
FIRST GRADE
|
Appearance
|
Blackish brown granule
|
|
Purity, %≥
|
97
|
95
|
Solidifying point, ℃≥
|
46.5
|
45.5
|
Melting point, ℃≥
|
46.0
|
45.0
|
Heating loss, % ≤
|
0.50
|
0.50
|
Ash content, % ≤
|
0.08
|
0.15
|