Item |
Top-grade
|
First grade
|
Qualified product
|
Appearance |
light yellow or Off-white powder, granular
|
||
Initial Melting point, ℃≥ |
173.0
|
171.0
|
170.0
|
Loss on heat, % ≤ |
0.30
|
0.40
|
0.50
|
Ash, % ≤ |
0.30
|
0.30
|
0.30
|
Residue on screen(149um), % ≤ |
0.0
|
0.1
|
0.1
|